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Finding the Fourth Proportional to 403.10, 604.79 and 159.78

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Solution

The fourth proportional to 403.10, 604.79 and 159.78 is: 239.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    403.10 : 604.79 = 159.78 : x
  2. Step 2: Convert to fraction form
    403.10/604.79 = 159.78/x
  3. Step 3: Cross multiply
    403.10x = 604.79 × 159.78
  4. Step 4: Simplify right side
    403.10x = 96,633.35
  5. Step 5: Solve for x
    x = 96,633.35/403.10
  6. Step 6: Final answer
    x = 239.73

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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.