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Finding the Fourth Proportional to 463.28, 639.17 and 274.23

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Solution

The fourth proportional to 463.28, 639.17 and 274.23 is: 378.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    463.28 : 639.17 = 274.23 : x
  2. Step 2: Convert to fraction form
    463.28/639.17 = 274.23/x
  3. Step 3: Cross multiply
    463.28x = 639.17 × 274.23
  4. Step 4: Simplify right side
    463.28x = 175,278.22
  5. Step 5: Solve for x
    x = 175,278.22/463.28
  6. Step 6: Final answer
    x = 378.35

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.