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Finding the Fourth Proportional to 166.65, 248.57 and 155.31

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Solution

The fourth proportional to 166.65, 248.57 and 155.31 is: 231.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    166.65 : 248.57 = 155.31 : x
  2. Step 2: Convert to fraction form
    166.65/248.57 = 155.31/x
  3. Step 3: Cross multiply
    166.65x = 248.57 × 155.31
  4. Step 4: Simplify right side
    166.65x = 38,604.63
  5. Step 5: Solve for x
    x = 38,604.63/166.65
  6. Step 6: Final answer
    x = 231.65

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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.