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Finding the Fourth Proportional to 290.53, 400.92 and 159.53

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Solution

The fourth proportional to 290.53, 400.92 and 159.53 is: 220.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    290.53 : 400.92 = 159.53 : x
  2. Step 2: Convert to fraction form
    290.53/400.92 = 159.53/x
  3. Step 3: Cross multiply
    290.53x = 400.92 × 159.53
  4. Step 4: Simplify right side
    290.53x = 63,958.77
  5. Step 5: Solve for x
    x = 63,958.77/290.53
  6. Step 6: Final answer
    x = 220.15

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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.