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Finding the Fourth Proportional to 521,316.60, 781,818.90 and 271,862.52

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Solution

The fourth proportional to 521,316.60, 781,818.90 and 271,862.52 is: 407,712.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,316.60 : 781,818.90 = 271,862.52 : x
  2. Step 2: Convert to fraction form
    521,316.60/781,818.90 = 271,862.52/x
  3. Step 3: Cross multiply
    521,316.60x = 781,818.90 × 271,862.52
  4. Step 4: Simplify right side
    521,316.60x = 212,547,256,337.63
  5. Step 5: Solve for x
    x = 212,547,256,337.63/521,316.60
  6. Step 6: Final answer
    x = 407,712.43

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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.