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Finding the Fourth Proportional to 291.20, 401.73 and 166.83

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Solution

The fourth proportional to 291.20, 401.73 and 166.83 is: 230.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    291.20 : 401.73 = 166.83 : x
  2. Step 2: Convert to fraction form
    291.20/401.73 = 166.83/x
  3. Step 3: Cross multiply
    291.20x = 401.73 × 166.83
  4. Step 4: Simplify right side
    291.20x = 67,019.61
  5. Step 5: Solve for x
    x = 67,019.61/291.20
  6. Step 6: Final answer
    x = 230.15

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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.