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Finding the Fourth Proportional to 220.49, 304.15 and 176.20

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Solution

The fourth proportional to 220.49, 304.15 and 176.20 is: 243.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.49 : 304.15 = 176.20 : x
  2. Step 2: Convert to fraction form
    220.49/304.15 = 176.20/x
  3. Step 3: Cross multiply
    220.49x = 304.15 × 176.20
  4. Step 4: Simplify right side
    220.49x = 53,591.03
  5. Step 5: Solve for x
    x = 53,591.03/220.49
  6. Step 6: Final answer
    x = 243.05

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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.