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Finding the Fourth Proportional to 458.60, 632.88 and 281.61

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Solution

The fourth proportional to 458.60, 632.88 and 281.61 is: 388.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    458.60 : 632.88 = 281.61 : x
  2. Step 2: Convert to fraction form
    458.60/632.88 = 281.61/x
  3. Step 3: Cross multiply
    458.60x = 632.88 × 281.61
  4. Step 4: Simplify right side
    458.60x = 178,225.34
  5. Step 5: Solve for x
    x = 178,225.34/458.60
  6. Step 6: Final answer
    x = 388.63

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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.