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Finding the Fourth Proportional to 657,474.10, 986,211.15 and 539,278.90

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Solution

The fourth proportional to 657,474.10, 986,211.15 and 539,278.90 is: 808,918.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,474.10 : 986,211.15 = 539,278.90 : x
  2. Step 2: Convert to fraction form
    657,474.10/986,211.15 = 539,278.90/x
  3. Step 3: Cross multiply
    657,474.10x = 986,211.15 × 539,278.90
  4. Step 4: Simplify right side
    657,474.10x = 531,842,864,139.74
  5. Step 5: Solve for x
    x = 531,842,864,139.74/657,474.10
  6. Step 6: Final answer
    x = 808,918.35

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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.