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Finding the Fourth Proportional to 399.79, 599.29 and 168.84

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Solution

The fourth proportional to 399.79, 599.29 and 168.84 is: 253.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    399.79 : 599.29 = 168.84 : x
  2. Step 2: Convert to fraction form
    399.79/599.29 = 168.84/x
  3. Step 3: Cross multiply
    399.79x = 599.29 × 168.84
  4. Step 4: Simplify right side
    399.79x = 101,180.28
  5. Step 5: Solve for x
    x = 101,180.28/399.79
  6. Step 6: Final answer
    x = 253.09

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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.