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Finding the Fourth Proportional to 457.66, 631.55 and 280.92

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Solution

The fourth proportional to 457.66, 631.55 and 280.92 is: 387.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    457.66 : 631.55 = 280.92 : x
  2. Step 2: Convert to fraction form
    457.66/631.55 = 280.92/x
  3. Step 3: Cross multiply
    457.66x = 631.55 × 280.92
  4. Step 4: Simplify right side
    457.66x = 177,410.46
  5. Step 5: Solve for x
    x = 177,410.46/457.66
  6. Step 6: Final answer
    x = 387.65

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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.