Home / 1,289,146,999.80-1,933,720,499.70-427,392,017.40

Finding the Fourth Proportional to 1,289,146,999.80, 1,933,720,499.70 and 427,392,017.40

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Solution

The fourth proportional to 1,289,146,999.80, 1,933,720,499.70 and 427,392,017.40 is: 641,088,026.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,289,146,999.80 : 1,933,720,499.70 = 427,392,017.40 : x
  2. Step 2: Convert to fraction form
    1,289,146,999.80/1,933,720,499.70 = 427,392,017.40/x
  3. Step 3: Cross multiply
    1,289,146,999.80x = 1,933,720,499.70 × 427,392,017.40
  4. Step 4: Simplify right side
    1,289,146,999.80x = 826,456,705,454,519,040
  5. Step 5: Solve for x
    x = 826,456,705,454,519,040/1,289,146,999.80
  6. Step 6: Final answer
    x = 641,088,026.10

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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.