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Finding the Fourth Proportional to 665,385.20, 998,077.80 and 547,287.20

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Solution

The fourth proportional to 665,385.20, 998,077.80 and 547,287.20 is: 820,930.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,385.20 : 998,077.80 = 547,287.20 : x
  2. Step 2: Convert to fraction form
    665,385.20/998,077.80 = 547,287.20/x
  3. Step 3: Cross multiply
    665,385.20x = 998,077.80 × 547,287.20
  4. Step 4: Simplify right side
    665,385.20x = 546,235,204,544.16
  5. Step 5: Solve for x
    x = 546,235,204,544.16/665,385.20
  6. Step 6: Final answer
    x = 820,930.80

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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.