Home / 1,290,244,628.40-1,935,366,942.60-428,601,620.40

Finding the Fourth Proportional to 1,290,244,628.40, 1,935,366,942.60 and 428,601,620.40

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Solution

The fourth proportional to 1,290,244,628.40, 1,935,366,942.60 and 428,601,620.40 is: 642,902,430.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,244,628.40 : 1,935,366,942.60 = 428,601,620.40 : x
  2. Step 2: Convert to fraction form
    1,290,244,628.40/1,935,366,942.60 = 428,601,620.40/x
  3. Step 3: Cross multiply
    1,290,244,628.40x = 1,935,366,942.60 × 428,601,620.40
  4. Step 4: Simplify right side
    1,290,244,628.40x = 829,501,407,666,953,728
  5. Step 5: Solve for x
    x = 829,501,407,666,953,728/1,290,244,628.40
  6. Step 6: Final answer
    x = 642,902,430.60

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.