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Finding the Fourth Proportional to 218.99, 328.26 and 161.13

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Solution

The fourth proportional to 218.99, 328.26 and 161.13 is: 241.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    218.99 : 328.26 = 161.13 : x
  2. Step 2: Convert to fraction form
    218.99/328.26 = 161.13/x
  3. Step 3: Cross multiply
    218.99x = 328.26 × 161.13
  4. Step 4: Simplify right side
    218.99x = 52,892.53
  5. Step 5: Solve for x
    x = 52,892.53/218.99
  6. Step 6: Final answer
    x = 241.53

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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.