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Finding the Fourth Proportional to 520,820.96, 781,229.16 and 221,255.60

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Solution

The fourth proportional to 520,820.96, 781,229.16 and 221,255.60 is: 331,882.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,820.96 : 781,229.16 = 221,255.60 : x
  2. Step 2: Convert to fraction form
    520,820.96/781,229.16 = 221,255.60/x
  3. Step 3: Cross multiply
    520,820.96x = 781,229.16 × 221,255.60
  4. Step 4: Simplify right side
    520,820.96x = 172,851,326,533.30
  5. Step 5: Solve for x
    x = 172,851,326,533.30/520,820.96
  6. Step 6: Final answer
    x = 331,882.43

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Similar ratio
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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.