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Finding the Fourth Proportional to 458.11, 632.20 and 248.29

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Solution

The fourth proportional to 458.11, 632.20 and 248.29 is: 342.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    458.11 : 632.20 = 248.29 : x
  2. Step 2: Convert to fraction form
    458.11/632.20 = 248.29/x
  3. Step 3: Cross multiply
    458.11x = 632.20 × 248.29
  4. Step 4: Simplify right side
    458.11x = 156,968.94
  5. Step 5: Solve for x
    x = 156,968.94/458.11
  6. Step 6: Final answer
    x = 342.64

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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.