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Finding the Fourth Proportional to 659,780.14, 910,442.12 and 387,859.48

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Solution

The fourth proportional to 659,780.14, 910,442.12 and 387,859.48 is: 535,214.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,780.14 : 910,442.12 = 387,859.48 : x
  2. Step 2: Convert to fraction form
    659,780.14/910,442.12 = 387,859.48/x
  3. Step 3: Cross multiply
    659,780.14x = 910,442.12 × 387,859.48
  4. Step 4: Simplify right side
    659,780.14x = 353,123,607,233.30
  5. Step 5: Solve for x
    x = 353,123,607,233.30/659,780.14
  6. Step 6: Final answer
    x = 535,214.06

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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.