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Finding the Fourth Proportional to 193.28, 266.60 and 156.38

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Solution

The fourth proportional to 193.28, 266.60 and 156.38 is: 215.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    193.28 : 266.60 = 156.38 : x
  2. Step 2: Convert to fraction form
    193.28/266.60 = 156.38/x
  3. Step 3: Cross multiply
    193.28x = 266.60 × 156.38
  4. Step 4: Simplify right side
    193.28x = 41,689.97
  5. Step 5: Solve for x
    x = 41,689.97/193.28
  6. Step 6: Final answer
    x = 215.70

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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.