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Finding the Fourth Proportional to 220.28, 330.47 and 186.12

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Solution

The fourth proportional to 220.28, 330.47 and 186.12 is: 279.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.28 : 330.47 = 186.12 : x
  2. Step 2: Convert to fraction form
    220.28/330.47 = 186.12/x
  3. Step 3: Cross multiply
    220.28x = 330.47 × 186.12
  4. Step 4: Simplify right side
    220.28x = 61,506.15
  5. Step 5: Solve for x
    x = 61,506.15/220.28
  6. Step 6: Final answer
    x = 279.22

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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.