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Finding the Fourth Proportional to 297.27, 410.20 and 172.92

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Solution

The fourth proportional to 297.27, 410.20 and 172.92 is: 238.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    297.27 : 410.20 = 172.92 : x
  2. Step 2: Convert to fraction form
    297.27/410.20 = 172.92/x
  3. Step 3: Cross multiply
    297.27x = 410.20 × 172.92
  4. Step 4: Simplify right side
    297.27x = 70,933.21
  5. Step 5: Solve for x
    x = 70,933.21/297.27
  6. Step 6: Final answer
    x = 238.62

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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.