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Finding the Fourth Proportional to 220.79, 329.57 and 204.50

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Solution

The fourth proportional to 220.79, 329.57 and 204.50 is: 305.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.79 : 329.57 = 204.50 : x
  2. Step 2: Convert to fraction form
    220.79/329.57 = 204.50/x
  3. Step 3: Cross multiply
    220.79x = 329.57 × 204.50
  4. Step 4: Simplify right side
    220.79x = 67,394.39
  5. Step 5: Solve for x
    x = 67,394.39/220.79
  6. Step 6: Final answer
    x = 305.25

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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.