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Finding the Fourth Proportional to 458,186.20, 687,279.30 and 433,691.80

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Solution

The fourth proportional to 458,186.20, 687,279.30 and 433,691.80 is: 650,537.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,186.20 : 687,279.30 = 433,691.80 : x
  2. Step 2: Convert to fraction form
    458,186.20/687,279.30 = 433,691.80/x
  3. Step 3: Cross multiply
    458,186.20x = 687,279.30 × 433,691.80
  4. Step 4: Simplify right side
    458,186.20x = 298,067,396,719.74
  5. Step 5: Solve for x
    x = 298,067,396,719.74/458,186.20
  6. Step 6: Final answer
    x = 650,537.70

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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.