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Finding the Fourth Proportional to 218.62, 328.14 and 194.46

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Solution

The fourth proportional to 218.62, 328.14 and 194.46 is: 291.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    218.62 : 328.14 = 194.46 : x
  2. Step 2: Convert to fraction form
    218.62/328.14 = 194.46/x
  3. Step 3: Cross multiply
    218.62x = 328.14 × 194.46
  4. Step 4: Simplify right side
    218.62x = 63,810.10
  5. Step 5: Solve for x
    x = 63,810.10/218.62
  6. Step 6: Final answer
    x = 291.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.