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Finding the Fourth Proportional to 220.24, 328.52 and 205.12

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Solution

The fourth proportional to 220.24, 328.52 and 205.12 is: 305.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.24 : 328.52 = 205.12 : x
  2. Step 2: Convert to fraction form
    220.24/328.52 = 205.12/x
  3. Step 3: Cross multiply
    220.24x = 328.52 × 205.12
  4. Step 4: Simplify right side
    220.24x = 67,386.02
  5. Step 5: Solve for x
    x = 67,386.02/220.24
  6. Step 6: Final answer
    x = 305.97

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.