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Finding the Fourth Proportional to 171.54, 256.08 and 148.32

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Solution

The fourth proportional to 171.54, 256.08 and 148.32 is: 221.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    171.54 : 256.08 = 148.32 : x
  2. Step 2: Convert to fraction form
    171.54/256.08 = 148.32/x
  3. Step 3: Cross multiply
    171.54x = 256.08 × 148.32
  4. Step 4: Simplify right side
    171.54x = 37,981.79
  5. Step 5: Solve for x
    x = 37,981.79/171.54
  6. Step 6: Final answer
    x = 221.42

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.