Home / 905,920,780.39-1,250,024,836.65-509,420,129.83

Finding the Fourth Proportional to 905,920,780.39, 1,250,024,836.65 and 509,420,129.83

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Solution

The fourth proportional to 905,920,780.39, 1,250,024,836.65 and 509,420,129.83 is: 702,917,769.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    905,920,780.39 : 1,250,024,836.65 = 509,420,129.83 : x
  2. Step 2: Convert to fraction form
    905,920,780.39/1,250,024,836.65 = 509,420,129.83/x
  3. Step 3: Cross multiply
    905,920,780.39x = 1,250,024,836.65 × 509,420,129.83
  4. Step 4: Simplify right side
    905,920,780.39x = 636,787,814,576,967,552
  5. Step 5: Solve for x
    x = 636,787,814,576,967,552/905,920,780.39
  6. Step 6: Final answer
    x = 702,917,769.81

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.