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Finding the Fourth Proportional to 290.28, 400.57 and 159.29

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Solution

The fourth proportional to 290.28, 400.57 and 159.29 is: 219.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    290.28 : 400.57 = 159.29 : x
  2. Step 2: Convert to fraction form
    290.28/400.57 = 159.29/x
  3. Step 3: Cross multiply
    290.28x = 400.57 × 159.29
  4. Step 4: Simplify right side
    290.28x = 63,806.80
  5. Step 5: Solve for x
    x = 63,806.80/290.28
  6. Step 6: Final answer
    x = 219.81

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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.