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Finding the Fourth Proportional to 634.28, 951.36 and 172.11

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Solution

The fourth proportional to 634.28, 951.36 and 172.11 is: 258.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    634.28 : 951.36 = 172.11 : x
  2. Step 2: Convert to fraction form
    634.28/951.36 = 172.11/x
  3. Step 3: Cross multiply
    634.28x = 951.36 × 172.11
  4. Step 4: Simplify right side
    634.28x = 163,738.57
  5. Step 5: Solve for x
    x = 163,738.57/634.28
  6. Step 6: Final answer
    x = 258.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.