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Finding the Fourth Proportional to 389,432.40, 584,148.60 and 220,887.60

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Solution

The fourth proportional to 389,432.40, 584,148.60 and 220,887.60 is: 331,331.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,432.40 : 584,148.60 = 220,887.60 : x
  2. Step 2: Convert to fraction form
    389,432.40/584,148.60 = 220,887.60/x
  3. Step 3: Cross multiply
    389,432.40x = 584,148.60 × 220,887.60
  4. Step 4: Simplify right side
    389,432.40x = 129,031,182,297.36
  5. Step 5: Solve for x
    x = 129,031,182,297.36/389,432.40
  6. Step 6: Final answer
    x = 331,331.40

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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.