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Finding the Fourth Proportional to 463.74, 639.86 and 267.18

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Solution

The fourth proportional to 463.74, 639.86 and 267.18 is: 368.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    463.74 : 639.86 = 267.18 : x
  2. Step 2: Convert to fraction form
    463.74/639.86 = 267.18/x
  3. Step 3: Cross multiply
    463.74x = 639.86 × 267.18
  4. Step 4: Simplify right side
    463.74x = 170,957.79
  5. Step 5: Solve for x
    x = 170,957.79/463.74
  6. Step 6: Final answer
    x = 368.65

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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.