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Finding the Fourth Proportional to 659,140.80, 988,711.20 and 259,794.60

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Solution

The fourth proportional to 659,140.80, 988,711.20 and 259,794.60 is: 389,691.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,140.80 : 988,711.20 = 259,794.60 : x
  2. Step 2: Convert to fraction form
    659,140.80/988,711.20 = 259,794.60/x
  3. Step 3: Cross multiply
    659,140.80x = 988,711.20 × 259,794.60
  4. Step 4: Simplify right side
    659,140.80x = 256,861,830,719.52
  5. Step 5: Solve for x
    x = 256,861,830,719.52/659,140.80
  6. Step 6: Final answer
    x = 389,691.90

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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.