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Finding the Fourth Proportional to 619,729.20, 929,593.80 and 220,820.40

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Solution

The fourth proportional to 619,729.20, 929,593.80 and 220,820.40 is: 331,230.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,729.20 : 929,593.80 = 220,820.40 : x
  2. Step 2: Convert to fraction form
    619,729.20/929,593.80 = 220,820.40/x
  3. Step 3: Cross multiply
    619,729.20x = 929,593.80 × 220,820.40
  4. Step 4: Simplify right side
    619,729.20x = 205,273,274,753.52
  5. Step 5: Solve for x
    x = 205,273,274,753.52/619,729.20
  6. Step 6: Final answer
    x = 331,230.60

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Similar ratio
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1.5x scale

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.