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Finding the Fourth Proportional to 638.56, 950.28 and 615.52

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Solution

The fourth proportional to 638.56, 950.28 and 615.52 is: 915.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.56 : 950.28 = 615.52 : x
  2. Step 2: Convert to fraction form
    638.56/950.28 = 615.52/x
  3. Step 3: Cross multiply
    638.56x = 950.28 × 615.52
  4. Step 4: Simplify right side
    638.56x = 584,916.35
  5. Step 5: Solve for x
    x = 584,916.35/638.56
  6. Step 6: Final answer
    x = 915.99

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.