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Finding the Fourth Proportional to 297.79, 410.91 and 166.78

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Solution

The fourth proportional to 297.79, 410.91 and 166.78 is: 230.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    297.79 : 410.91 = 166.78 : x
  2. Step 2: Convert to fraction form
    297.79/410.91 = 166.78/x
  3. Step 3: Cross multiply
    297.79x = 410.91 × 166.78
  4. Step 4: Simplify right side
    297.79x = 68,531.57
  5. Step 5: Solve for x
    x = 68,531.57/297.79
  6. Step 6: Final answer
    x = 230.13

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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.