Home / 1,517.60-2,276.11-421.97

Finding the Fourth Proportional to 1,517.60, 2,276.11 and 421.97

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Solution

The fourth proportional to 1,517.60, 2,276.11 and 421.97 is: 632.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,517.60 : 2,276.11 = 421.97 : x
  2. Step 2: Convert to fraction form
    1,517.60/2,276.11 = 421.97/x
  3. Step 3: Cross multiply
    1,517.60x = 2,276.11 × 421.97
  4. Step 4: Simplify right side
    1,517.60x = 960,437.70
  5. Step 5: Solve for x
    x = 960,437.70/1,517.60
  6. Step 6: Final answer
    x = 632.87

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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.