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Finding the Fourth Proportional to 402.75, 603.72 and 220.23

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Solution

The fourth proportional to 402.75, 603.72 and 220.23 is: 330.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    402.75 : 603.72 = 220.23 : x
  2. Step 2: Convert to fraction form
    402.75/603.72 = 220.23/x
  3. Step 3: Cross multiply
    402.75x = 603.72 × 220.23
  4. Step 4: Simplify right side
    402.75x = 132,957.26
  5. Step 5: Solve for x
    x = 132,957.26/402.75
  6. Step 6: Final answer
    x = 330.12

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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.