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Finding the Fourth Proportional to 171.16, 255.49 and 154.92

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Solution

The fourth proportional to 171.16, 255.49 and 154.92 is: 231.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    171.16 : 255.49 = 154.92 : x
  2. Step 2: Convert to fraction form
    171.16/255.49 = 154.92/x
  3. Step 3: Cross multiply
    171.16x = 255.49 × 154.92
  4. Step 4: Simplify right side
    171.16x = 39,580.51
  5. Step 5: Solve for x
    x = 39,580.51/171.16
  6. Step 6: Final answer
    x = 231.25

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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.