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Finding the Fourth Proportional to 290.31, 400.50 and 179.76

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Solution

The fourth proportional to 290.31, 400.50 and 179.76 is: 247.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    290.31 : 400.50 = 179.76 : x
  2. Step 2: Convert to fraction form
    290.31/400.50 = 179.76/x
  3. Step 3: Cross multiply
    290.31x = 400.50 × 179.76
  4. Step 4: Simplify right side
    290.31x = 71,993.88
  5. Step 5: Solve for x
    x = 71,993.88/290.31
  6. Step 6: Final answer
    x = 247.99

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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.