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Finding the Fourth Proportional to 218.75, 301.61 and 179.36

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Solution

The fourth proportional to 218.75, 301.61 and 179.36 is: 247.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    218.75 : 301.61 = 179.36 : x
  2. Step 2: Convert to fraction form
    218.75/301.61 = 179.36/x
  3. Step 3: Cross multiply
    218.75x = 301.61 × 179.36
  4. Step 4: Simplify right side
    218.75x = 54,095.87
  5. Step 5: Solve for x
    x = 54,095.87/218.75
  6. Step 6: Final answer
    x = 247.30

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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.