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Finding the Fourth Proportional to 220.04, 329.94 and 90.05

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Solution

The fourth proportional to 220.04, 329.94 and 90.05 is: 135.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.04 : 329.94 = 90.05 : x
  2. Step 2: Convert to fraction form
    220.04/329.94 = 90.05/x
  3. Step 3: Cross multiply
    220.04x = 329.94 × 90.05
  4. Step 4: Simplify right side
    220.04x = 29,711.02
  5. Step 5: Solve for x
    x = 29,711.02/220.04
  6. Step 6: Final answer
    x = 135.03

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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.