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Finding the Fourth Proportional to 389,445.90, 584,168.85 and 220,901.10

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Solution

The fourth proportional to 389,445.90, 584,168.85 and 220,901.10 is: 331,351.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,445.90 : 584,168.85 = 220,901.10 : x
  2. Step 2: Convert to fraction form
    389,445.90/584,168.85 = 220,901.10/x
  3. Step 3: Cross multiply
    389,445.90x = 584,168.85 × 220,901.10
  4. Step 4: Simplify right side
    389,445.90x = 129,043,541,550.74
  5. Step 5: Solve for x
    x = 129,043,541,550.74/389,445.90
  6. Step 6: Final answer
    x = 331,351.65

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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.