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Finding the Fourth Proportional to 197.71, 296.60 and 74.32

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Solution

The fourth proportional to 197.71, 296.60 and 74.32 is: 111.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    197.71 : 296.60 = 74.32 : x
  2. Step 2: Convert to fraction form
    197.71/296.60 = 74.32/x
  3. Step 3: Cross multiply
    197.71x = 296.60 × 74.32
  4. Step 4: Simplify right side
    197.71x = 22,043.31
  5. Step 5: Solve for x
    x = 22,043.31/197.71
  6. Step 6: Final answer
    x = 111.49

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.