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Finding the Fourth Proportional to 290.29, 400.58 and 159.31

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Solution

The fourth proportional to 290.29, 400.58 and 159.31 is: 219.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    290.29 : 400.58 = 159.31 : x
  2. Step 2: Convert to fraction form
    290.29/400.58 = 159.31/x
  3. Step 3: Cross multiply
    290.29x = 400.58 × 159.31
  4. Step 4: Simplify right side
    290.29x = 63,816.23
  5. Step 5: Solve for x
    x = 63,816.23/290.29
  6. Step 6: Final answer
    x = 219.83

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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.