Home / 461,326.20-691,989.30-128,902.20

Finding the Fourth Proportional to 461,326.20, 691,989.30 and 128,902.20

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Solution

The fourth proportional to 461,326.20, 691,989.30 and 128,902.20 is: 193,353.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    461,326.20 : 691,989.30 = 128,902.20 : x
  2. Step 2: Convert to fraction form
    461,326.20/691,989.30 = 128,902.20/x
  3. Step 3: Cross multiply
    461,326.20x = 691,989.30 × 128,902.20
  4. Step 4: Simplify right side
    461,326.20x = 89,198,943,146.46
  5. Step 5: Solve for x
    x = 89,198,943,146.46/461,326.20
  6. Step 6: Final answer
    x = 193,353.30

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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.