Home / 812,084.20-1,218,126.30-391,402.60

Finding the Fourth Proportional to 812,084.20, 1,218,126.30 and 391,402.60

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Solution

The fourth proportional to 812,084.20, 1,218,126.30 and 391,402.60 is: 587,103.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,084.20 : 1,218,126.30 = 391,402.60 : x
  2. Step 2: Convert to fraction form
    812,084.20/1,218,126.30 = 391,402.60/x
  3. Step 3: Cross multiply
    812,084.20x = 1,218,126.30 × 391,402.60
  4. Step 4: Simplify right side
    812,084.20x = 476,777,800,948.38
  5. Step 5: Solve for x
    x = 476,777,800,948.38/812,084.20
  6. Step 6: Final answer
    x = 587,103.90

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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.