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Finding the Fourth Proportional to 290.56, 400.87 and 166.13

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Solution

The fourth proportional to 290.56, 400.87 and 166.13 is: 229.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    290.56 : 400.87 = 166.13 : x
  2. Step 2: Convert to fraction form
    290.56/400.87 = 166.13/x
  3. Step 3: Cross multiply
    290.56x = 400.87 × 166.13
  4. Step 4: Simplify right side
    290.56x = 66,595.70
  5. Step 5: Solve for x
    x = 66,595.70/290.56
  6. Step 6: Final answer
    x = 229.20

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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.