Home / 812,134.20-1,218,201.30-391,452.60

Finding the Fourth Proportional to 812,134.20, 1,218,201.30 and 391,452.60

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Solution

The fourth proportional to 812,134.20, 1,218,201.30 and 391,452.60 is: 587,178.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,134.20 : 1,218,201.30 = 391,452.60 : x
  2. Step 2: Convert to fraction form
    812,134.20/1,218,201.30 = 391,452.60/x
  3. Step 3: Cross multiply
    812,134.20x = 1,218,201.30 × 391,452.60
  4. Step 4: Simplify right side
    812,134.20x = 476,868,066,208.38
  5. Step 5: Solve for x
    x = 476,868,066,208.38/812,134.20
  6. Step 6: Final answer
    x = 587,178.90

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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.