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Finding the Fourth Proportional to 260,785.20, 391,177.80 and 134,425.20

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Solution

The fourth proportional to 260,785.20, 391,177.80 and 134,425.20 is: 201,637.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,785.20 : 391,177.80 = 134,425.20 : x
  2. Step 2: Convert to fraction form
    260,785.20/391,177.80 = 134,425.20/x
  3. Step 3: Cross multiply
    260,785.20x = 391,177.80 × 134,425.20
  4. Step 4: Simplify right side
    260,785.20x = 52,584,154,000.56
  5. Step 5: Solve for x
    x = 52,584,154,000.56/260,785.20
  6. Step 6: Final answer
    x = 201,637.80

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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.