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Finding the Fourth Proportional to 297.18, 410.13 and 172.85

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Solution

The fourth proportional to 297.18, 410.13 and 172.85 is: 238.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    297.18 : 410.13 = 172.85 : x
  2. Step 2: Convert to fraction form
    297.18/410.13 = 172.85/x
  3. Step 3: Cross multiply
    297.18x = 410.13 × 172.85
  4. Step 4: Simplify right side
    297.18x = 70,890.97
  5. Step 5: Solve for x
    x = 70,890.97/297.18
  6. Step 6: Final answer
    x = 238.55

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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.