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Finding the Fourth Proportional to 457.72, 631.64 and 261.26

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Solution

The fourth proportional to 457.72, 631.64 and 261.26 is: 360.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    457.72 : 631.64 = 261.26 : x
  2. Step 2: Convert to fraction form
    457.72/631.64 = 261.26/x
  3. Step 3: Cross multiply
    457.72x = 631.64 × 261.26
  4. Step 4: Simplify right side
    457.72x = 165,022.27
  5. Step 5: Solve for x
    x = 165,022.27/457.72
  6. Step 6: Final answer
    x = 360.53

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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.