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Finding the Fourth Proportional to 399.16, 598.75 and 167.79

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Solution

The fourth proportional to 399.16, 598.75 and 167.79 is: 251.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    399.16 : 598.75 = 167.79 : x
  2. Step 2: Convert to fraction form
    399.16/598.75 = 167.79/x
  3. Step 3: Cross multiply
    399.16x = 598.75 × 167.79
  4. Step 4: Simplify right side
    399.16x = 100,463.42
  5. Step 5: Solve for x
    x = 100,463.42/399.16
  6. Step 6: Final answer
    x = 251.69

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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.