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Finding the Fourth Proportional to 171.68, 256.57 and 161.69

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Solution

The fourth proportional to 171.68, 256.57 and 161.69 is: 241.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    171.68 : 256.57 = 161.69 : x
  2. Step 2: Convert to fraction form
    171.68/256.57 = 161.69/x
  3. Step 3: Cross multiply
    171.68x = 256.57 × 161.69
  4. Step 4: Simplify right side
    171.68x = 41,483.12
  5. Step 5: Solve for x
    x = 41,483.12/171.68
  6. Step 6: Final answer
    x = 241.64

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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.