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Finding the Fourth Proportional to 457.70, 631.61 and 261.23

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Solution

The fourth proportional to 457.70, 631.61 and 261.23 is: 360.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    457.70 : 631.61 = 261.23 : x
  2. Step 2: Convert to fraction form
    457.70/631.61 = 261.23/x
  3. Step 3: Cross multiply
    457.70x = 631.61 × 261.23
  4. Step 4: Simplify right side
    457.70x = 164,991.02
  5. Step 5: Solve for x
    x = 164,991.02/457.70
  6. Step 6: Final answer
    x = 360.48

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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.