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Finding the Fourth Proportional to 1,049.17, 1,571.60 and 615.28

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Solution

The fourth proportional to 1,049.17, 1,571.60 and 615.28 is: 921.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,049.17 : 1,571.60 = 615.28 : x
  2. Step 2: Convert to fraction form
    1,049.17/1,571.60 = 615.28/x
  3. Step 3: Cross multiply
    1,049.17x = 1,571.60 × 615.28
  4. Step 4: Simplify right side
    1,049.17x = 966,974.90
  5. Step 5: Solve for x
    x = 966,974.90/1,049.17
  6. Step 6: Final answer
    x = 921.65

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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.