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Finding the Fourth Proportional to 402.95, 604.89 and 220.70

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Solution

The fourth proportional to 402.95, 604.89 and 220.70 is: 331.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    402.95 : 604.89 = 220.70 : x
  2. Step 2: Convert to fraction form
    402.95/604.89 = 220.70/x
  3. Step 3: Cross multiply
    402.95x = 604.89 × 220.70
  4. Step 4: Simplify right side
    402.95x = 133,496.20
  5. Step 5: Solve for x
    x = 133,496.20/402.95
  6. Step 6: Final answer
    x = 331.30

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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.