Home / 1,290,244,621.40-1,935,366,932.10-428,601,613.40

Finding the Fourth Proportional to 1,290,244,621.40, 1,935,366,932.10 and 428,601,613.40

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Solution

The fourth proportional to 1,290,244,621.40, 1,935,366,932.10 and 428,601,613.40 is: 642,902,420.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,244,621.40 : 1,935,366,932.10 = 428,601,613.40 : x
  2. Step 2: Convert to fraction form
    1,290,244,621.40/1,935,366,932.10 = 428,601,613.40/x
  3. Step 3: Cross multiply
    1,290,244,621.40x = 1,935,366,932.10 × 428,601,613.40
  4. Step 4: Simplify right side
    1,290,244,621.40x = 829,501,389,619,068,160
  5. Step 5: Solve for x
    x = 829,501,389,619,068,160/1,290,244,621.40
  6. Step 6: Final answer
    x = 642,902,420.10

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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.