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Finding the Fourth Proportional to 457.75, 631.70 and 261.26

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Solution

The fourth proportional to 457.75, 631.70 and 261.26 is: 360.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    457.75 : 631.70 = 261.26 : x
  2. Step 2: Convert to fraction form
    457.75/631.70 = 261.26/x
  3. Step 3: Cross multiply
    457.75x = 631.70 × 261.26
  4. Step 4: Simplify right side
    457.75x = 165,036.83
  5. Step 5: Solve for x
    x = 165,036.83/457.75
  6. Step 6: Final answer
    x = 360.54

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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.