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Finding the Fourth Proportional to 458.55, 632.88 and 272.15

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Solution

The fourth proportional to 458.55, 632.88 and 272.15 is: 375.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    458.55 : 632.88 = 272.15 : x
  2. Step 2: Convert to fraction form
    458.55/632.88 = 272.15/x
  3. Step 3: Cross multiply
    458.55x = 632.88 × 272.15
  4. Step 4: Simplify right side
    458.55x = 172,238.29
  5. Step 5: Solve for x
    x = 172,238.29/458.55
  6. Step 6: Final answer
    x = 375.62

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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.