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Finding the Fourth Proportional to 457.95, 631.95 and 261.45

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Solution

The fourth proportional to 457.95, 631.95 and 261.45 is: 360.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    457.95 : 631.95 = 261.45 : x
  2. Step 2: Convert to fraction form
    457.95/631.95 = 261.45/x
  3. Step 3: Cross multiply
    457.95x = 631.95 × 261.45
  4. Step 4: Simplify right side
    457.95x = 165,223.33
  5. Step 5: Solve for x
    x = 165,223.33/457.95
  6. Step 6: Final answer
    x = 360.79

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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.