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Finding the Fourth Proportional to 574,221.20, 861,331.80 and 397,074.20

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Solution

The fourth proportional to 574,221.20, 861,331.80 and 397,074.20 is: 595,611.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    574,221.20 : 861,331.80 = 397,074.20 : x
  2. Step 2: Convert to fraction form
    574,221.20/861,331.80 = 397,074.20/x
  3. Step 3: Cross multiply
    574,221.20x = 861,331.80 × 397,074.20
  4. Step 4: Simplify right side
    574,221.20x = 342,012,635,419.56
  5. Step 5: Solve for x
    x = 342,012,635,419.56/574,221.20
  6. Step 6: Final answer
    x = 595,611.30

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Double scale
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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.