Home / 425,718,009.20-638,577,013.80-418,543,555.70

Finding the Fourth Proportional to 425,718,009.20, 638,577,013.80 and 418,543,555.70

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Solution

The fourth proportional to 425,718,009.20, 638,577,013.80 and 418,543,555.70 is: 627,815,333.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,718,009.20 : 638,577,013.80 = 418,543,555.70 : x
  2. Step 2: Convert to fraction form
    425,718,009.20/638,577,013.80 = 418,543,555.70/x
  3. Step 3: Cross multiply
    425,718,009.20x = 638,577,013.80 × 418,543,555.70
  4. Step 4: Simplify right side
    425,718,009.20x = 267,272,293,944,139,936
  5. Step 5: Solve for x
    x = 267,272,293,944,139,936/425,718,009.20
  6. Step 6: Final answer
    x = 627,815,333.55

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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.