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Finding the Fourth Proportional to 457.95, 686.78 and 252.62

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Solution

The fourth proportional to 457.95, 686.78 and 252.62 is: 378.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    457.95 : 686.78 = 252.62 : x
  2. Step 2: Convert to fraction form
    457.95/686.78 = 252.62/x
  3. Step 3: Cross multiply
    457.95x = 686.78 × 252.62
  4. Step 4: Simplify right side
    457.95x = 173,493.19
  5. Step 5: Solve for x
    x = 173,493.19/457.95
  6. Step 6: Final answer
    x = 378.84

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.