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Finding the Fourth Proportional to 1,517.45, 2,276.20 and 477.43

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Solution

The fourth proportional to 1,517.45, 2,276.20 and 477.43 is: 716.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,517.45 : 2,276.20 = 477.43 : x
  2. Step 2: Convert to fraction form
    1,517.45/2,276.20 = 477.43/x
  3. Step 3: Cross multiply
    1,517.45x = 2,276.20 × 477.43
  4. Step 4: Simplify right side
    1,517.45x = 1,086,726.17
  5. Step 5: Solve for x
    x = 1,086,726.17/1,517.45
  6. Step 6: Final answer
    x = 716.15

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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.