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Finding the Fourth Proportional to 399.85, 599.79 and 168.69

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Solution

The fourth proportional to 399.85, 599.79 and 168.69 is: 253.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    399.85 : 599.79 = 168.69 : x
  2. Step 2: Convert to fraction form
    399.85/599.79 = 168.69/x
  3. Step 3: Cross multiply
    399.85x = 599.79 × 168.69
  4. Step 4: Simplify right side
    399.85x = 101,181.46
  5. Step 5: Solve for x
    x = 101,181.46/399.85
  6. Step 6: Final answer
    x = 253.05

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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.