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Finding the Fourth Proportional to 463.14, 639.20 and 266.61

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Solution

The fourth proportional to 463.14, 639.20 and 266.61 is: 367.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    463.14 : 639.20 = 266.61 : x
  2. Step 2: Convert to fraction form
    463.14/639.20 = 266.61/x
  3. Step 3: Cross multiply
    463.14x = 639.20 × 266.61
  4. Step 4: Simplify right side
    463.14x = 170,417.11
  5. Step 5: Solve for x
    x = 170,417.11/463.14
  6. Step 6: Final answer
    x = 367.96

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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.