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Finding the Fourth Proportional to 463.28, 639.30 and 266.78

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Solution

The fourth proportional to 463.28, 639.30 and 266.78 is: 368.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    463.28 : 639.30 = 266.78 : x
  2. Step 2: Convert to fraction form
    463.28/639.30 = 266.78/x
  3. Step 3: Cross multiply
    463.28x = 639.30 × 266.78
  4. Step 4: Simplify right side
    463.28x = 170,552.45
  5. Step 5: Solve for x
    x = 170,552.45/463.28
  6. Step 6: Final answer
    x = 368.14

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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.