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Finding the Fourth Proportional to 402.85, 604.28 and 114.29

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Solution

The fourth proportional to 402.85, 604.28 and 114.29 is: 171.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    402.85 : 604.28 = 114.29 : x
  2. Step 2: Convert to fraction form
    402.85/604.28 = 114.29/x
  3. Step 3: Cross multiply
    402.85x = 604.28 × 114.29
  4. Step 4: Simplify right side
    402.85x = 69,059.57
  5. Step 5: Solve for x
    x = 69,059.57/402.85
  6. Step 6: Final answer
    x = 171.43

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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.