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Finding the Fourth Proportional to 457.28, 631.08 and 260.80

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Solution

The fourth proportional to 457.28, 631.08 and 260.80 is: 359.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    457.28 : 631.08 = 260.80 : x
  2. Step 2: Convert to fraction form
    457.28/631.08 = 260.80/x
  3. Step 3: Cross multiply
    457.28x = 631.08 × 260.80
  4. Step 4: Simplify right side
    457.28x = 164,585.66
  5. Step 5: Solve for x
    x = 164,585.66/457.28
  6. Step 6: Final answer
    x = 359.92

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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.