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Finding the Fourth Proportional to 220.76, 329.59 and 190.20

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Solution

The fourth proportional to 220.76, 329.59 and 190.20 is: 283.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.76 : 329.59 = 190.20 : x
  2. Step 2: Convert to fraction form
    220.76/329.59 = 190.20/x
  3. Step 3: Cross multiply
    220.76x = 329.59 × 190.20
  4. Step 4: Simplify right side
    220.76x = 62,688.02
  5. Step 5: Solve for x
    x = 62,688.02/220.76
  6. Step 6: Final answer
    x = 283.96

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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.