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Finding the Fourth Proportional to 218.69, 328.02 and 178.29

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Solution

The fourth proportional to 218.69, 328.02 and 178.29 is: 267.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    218.69 : 328.02 = 178.29 : x
  2. Step 2: Convert to fraction form
    218.69/328.02 = 178.29/x
  3. Step 3: Cross multiply
    218.69x = 328.02 × 178.29
  4. Step 4: Simplify right side
    218.69x = 58,482.69
  5. Step 5: Solve for x
    x = 58,482.69/218.69
  6. Step 6: Final answer
    x = 267.43

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