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Finding the Fourth Proportional to 402.96, 604.56 and 186.48

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Solution

The fourth proportional to 402.96, 604.56 and 186.48 is: 279.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    402.96 : 604.56 = 186.48 : x
  2. Step 2: Convert to fraction form
    402.96/604.56 = 186.48/x
  3. Step 3: Cross multiply
    402.96x = 604.56 × 186.48
  4. Step 4: Simplify right side
    402.96x = 112,738.35
  5. Step 5: Solve for x
    x = 112,738.35/402.96
  6. Step 6: Final answer
    x = 279.78

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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.