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Finding the Fourth Proportional to 291.16, 401.88 and 166.84

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Solution

The fourth proportional to 291.16, 401.88 and 166.84 is: 230.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    291.16 : 401.88 = 166.84 : x
  2. Step 2: Convert to fraction form
    291.16/401.88 = 166.84/x
  3. Step 3: Cross multiply
    291.16x = 401.88 × 166.84
  4. Step 4: Simplify right side
    291.16x = 67,049.66
  5. Step 5: Solve for x
    x = 67,049.66/291.16
  6. Step 6: Final answer
    x = 230.28

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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.