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Finding the Fourth Proportional to 402.98, 604.29 and 238.54

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Solution

The fourth proportional to 402.98, 604.29 and 238.54 is: 357.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    402.98 : 604.29 = 238.54 : x
  2. Step 2: Convert to fraction form
    402.98/604.29 = 238.54/x
  3. Step 3: Cross multiply
    402.98x = 604.29 × 238.54
  4. Step 4: Simplify right side
    402.98x = 144,147.34
  5. Step 5: Solve for x
    x = 144,147.34/402.98
  6. Step 6: Final answer
    x = 357.70

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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.