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Finding the Fourth Proportional to 538,820.70, 807,712.65 and 418,811.10

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Solution

The fourth proportional to 538,820.70, 807,712.65 and 418,811.10 is: 627,813.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,820.70 : 807,712.65 = 418,811.10 : x
  2. Step 2: Convert to fraction form
    538,820.70/807,712.65 = 418,811.10/x
  3. Step 3: Cross multiply
    538,820.70x = 807,712.65 × 418,811.10
  4. Step 4: Simplify right side
    538,820.70x = 338,279,023,430.42
  5. Step 5: Solve for x
    x = 338,279,023,430.42/538,820.70
  6. Step 6: Final answer
    x = 627,813.71

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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.