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Finding the Fourth Proportional to 458.31, 632.47 and 251.31

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Solution

The fourth proportional to 458.31, 632.47 and 251.31 is: 346.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    458.31 : 632.47 = 251.31 : x
  2. Step 2: Convert to fraction form
    458.31/632.47 = 251.31/x
  3. Step 3: Cross multiply
    458.31x = 632.47 × 251.31
  4. Step 4: Simplify right side
    458.31x = 158,946.04
  5. Step 5: Solve for x
    x = 158,946.04/458.31
  6. Step 6: Final answer
    x = 346.81

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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.