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Finding the Fourth Proportional to 457.47, 631.28 and 261.02

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Solution

The fourth proportional to 457.47, 631.28 and 261.02 is: 360.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    457.47 : 631.28 = 261.02 : x
  2. Step 2: Convert to fraction form
    457.47/631.28 = 261.02/x
  3. Step 3: Cross multiply
    457.47x = 631.28 × 261.02
  4. Step 4: Simplify right side
    457.47x = 164,778.94
  5. Step 5: Solve for x
    x = 164,778.94/457.47
  6. Step 6: Final answer
    x = 360.20

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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.