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Finding the Fourth Proportional to 193.28, 266.72 and 115.60

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Solution

The fourth proportional to 193.28, 266.72 and 115.60 is: 159.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    193.28 : 266.72 = 115.60 : x
  2. Step 2: Convert to fraction form
    193.28/266.72 = 115.60/x
  3. Step 3: Cross multiply
    193.28x = 266.72 × 115.60
  4. Step 4: Simplify right side
    193.28x = 30,832.83
  5. Step 5: Solve for x
    x = 30,832.83/193.28
  6. Step 6: Final answer
    x = 159.52

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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.