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Finding the Fourth Proportional to 171.05, 256.64 and 62.91

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Solution

The fourth proportional to 171.05, 256.64 and 62.91 is: 94.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    171.05 : 256.64 = 62.91 : x
  2. Step 2: Convert to fraction form
    171.05/256.64 = 62.91/x
  3. Step 3: Cross multiply
    171.05x = 256.64 × 62.91
  4. Step 4: Simplify right side
    171.05x = 16,144.91
  5. Step 5: Solve for x
    x = 16,144.91/171.05
  6. Step 6: Final answer
    x = 94.39

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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.