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Finding the Fourth Proportional to 399.89, 600.08 and 168.78

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Solution

The fourth proportional to 399.89, 600.08 and 168.78 is: 253.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    399.89 : 600.08 = 168.78 : x
  2. Step 2: Convert to fraction form
    399.89/600.08 = 168.78/x
  3. Step 3: Cross multiply
    399.89x = 600.08 × 168.78
  4. Step 4: Simplify right side
    399.89x = 101,284.33
  5. Step 5: Solve for x
    x = 101,284.33/399.89
  6. Step 6: Final answer
    x = 253.28

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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.