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Finding the Fourth Proportional to 291, 401.56 and 166.65

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Solution

The fourth proportional to 291, 401.56 and 166.65 is: 229.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    291 : 401.56 = 166.65 : x
  2. Step 2: Convert to fraction form
    291/401.56 = 166.65/x
  3. Step 3: Cross multiply
    291x = 401.56 × 166.65
  4. Step 4: Simplify right side
    291x = 66,919.97
  5. Step 5: Solve for x
    x = 66,919.97/291
  6. Step 6: Final answer
    x = 229.97

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.