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Finding the Fourth Proportional to 391,446.78, 539,897.31 and 337,093.08

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Solution

The fourth proportional to 391,446.78, 539,897.31 and 337,093.08 is: 464,930.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,446.78 : 539,897.31 = 337,093.08 : x
  2. Step 2: Convert to fraction form
    391,446.78/539,897.31 = 337,093.08/x
  3. Step 3: Cross multiply
    391,446.78x = 539,897.31 × 337,093.08
  4. Step 4: Simplify right side
    391,446.78x = 181,995,647,111.62
  5. Step 5: Solve for x
    x = 181,995,647,111.62/391,446.78
  6. Step 6: Final answer
    x = 464,930.76

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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.