Home / 1,517.45-2,276.17-421.81

Finding the Fourth Proportional to 1,517.45, 2,276.17 and 421.81

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Solution

The fourth proportional to 1,517.45, 2,276.17 and 421.81 is: 632.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,517.45 : 2,276.17 = 421.81 : x
  2. Step 2: Convert to fraction form
    1,517.45/2,276.17 = 421.81/x
  3. Step 3: Cross multiply
    1,517.45x = 2,276.17 × 421.81
  4. Step 4: Simplify right side
    1,517.45x = 960,104.52
  5. Step 5: Solve for x
    x = 960,104.52/1,517.45
  6. Step 6: Final answer
    x = 632.71

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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.