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Finding the Fourth Proportional to 193.43, 266.22 and 172.71

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Solution

The fourth proportional to 193.43, 266.22 and 172.71 is: 237.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    193.43 : 266.22 = 172.71 : x
  2. Step 2: Convert to fraction form
    193.43/266.22 = 172.71/x
  3. Step 3: Cross multiply
    193.43x = 266.22 × 172.71
  4. Step 4: Simplify right side
    193.43x = 45,978.86
  5. Step 5: Solve for x
    x = 45,978.86/193.43
  6. Step 6: Final answer
    x = 237.70

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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.