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Finding the Fourth Proportional to 199.27, 275.05 and 129.33

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Solution

The fourth proportional to 199.27, 275.05 and 129.33 is: 178.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    199.27 : 275.05 = 129.33 : x
  2. Step 2: Convert to fraction form
    199.27/275.05 = 129.33/x
  3. Step 3: Cross multiply
    199.27x = 275.05 × 129.33
  4. Step 4: Simplify right side
    199.27x = 35,572.22
  5. Step 5: Solve for x
    x = 35,572.22/199.27
  6. Step 6: Final answer
    x = 178.51

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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.