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Finding the Fourth Proportional to 663,617.20, 995,425.80 and 220,385.20

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Solution

The fourth proportional to 663,617.20, 995,425.80 and 220,385.20 is: 330,577.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,617.20 : 995,425.80 = 220,385.20 : x
  2. Step 2: Convert to fraction form
    663,617.20/995,425.80 = 220,385.20/x
  3. Step 3: Cross multiply
    663,617.20x = 995,425.80 × 220,385.20
  4. Step 4: Simplify right side
    663,617.20x = 219,377,114,018.16
  5. Step 5: Solve for x
    x = 219,377,114,018.16/663,617.20
  6. Step 6: Final answer
    x = 330,577.80

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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.