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Finding the Fourth Proportional to 457.31, 631.09 and 260.82

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Solution

The fourth proportional to 457.31, 631.09 and 260.82 is: 359.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    457.31 : 631.09 = 260.82 : x
  2. Step 2: Convert to fraction form
    457.31/631.09 = 260.82/x
  3. Step 3: Cross multiply
    457.31x = 631.09 × 260.82
  4. Step 4: Simplify right side
    457.31x = 164,601.22
  5. Step 5: Solve for x
    x = 164,601.22/457.31
  6. Step 6: Final answer
    x = 359.93

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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.