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Finding the Fourth Proportional to 659,616.60, 910,839.04 and 415,009.20

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Solution

The fourth proportional to 659,616.60, 910,839.04 and 415,009.20 is: 573,070.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,616.60 : 910,839.04 = 415,009.20 : x
  2. Step 2: Convert to fraction form
    659,616.60/910,839.04 = 415,009.20/x
  3. Step 3: Cross multiply
    659,616.60x = 910,839.04 × 415,009.20
  4. Step 4: Simplify right side
    659,616.60x = 378,006,581,319.17
  5. Step 5: Solve for x
    x = 378,006,581,319.17/659,616.60
  6. Step 6: Final answer
    x = 573,070.15

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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.