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Finding the Fourth Proportional to 220.02, 329.76 and 143.07

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Solution

The fourth proportional to 220.02, 329.76 and 143.07 is: 214.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.02 : 329.76 = 143.07 : x
  2. Step 2: Convert to fraction form
    220.02/329.76 = 143.07/x
  3. Step 3: Cross multiply
    220.02x = 329.76 × 143.07
  4. Step 4: Simplify right side
    220.02x = 47,178.76
  5. Step 5: Solve for x
    x = 47,178.76/220.02
  6. Step 6: Final answer
    x = 214.43

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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.