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Finding the Fourth Proportional to 290.15, 400.28 and 179.59

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Solution

The fourth proportional to 290.15, 400.28 and 179.59 is: 247.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    290.15 : 400.28 = 179.59 : x
  2. Step 2: Convert to fraction form
    290.15/400.28 = 179.59/x
  3. Step 3: Cross multiply
    290.15x = 400.28 × 179.59
  4. Step 4: Simplify right side
    290.15x = 71,884.39
  5. Step 5: Solve for x
    x = 71,884.39/290.15
  6. Step 6: Final answer
    x = 247.75

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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.