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Finding the Fourth Proportional to 521,066.60, 781,052.70 and 331,672.04

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Solution

The fourth proportional to 521,066.60, 781,052.70 and 331,672.04 is: 497,159.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,066.60 : 781,052.70 = 331,672.04 : x
  2. Step 2: Convert to fraction form
    521,066.60/781,052.70 = 331,672.04/x
  3. Step 3: Cross multiply
    521,066.60x = 781,052.70 × 331,672.04
  4. Step 4: Simplify right side
    521,066.60x = 259,053,342,356.51
  5. Step 5: Solve for x
    x = 259,053,342,356.51/521,066.60
  6. Step 6: Final answer
    x = 497,159.75

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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.