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Finding the Fourth Proportional to 399.91, 552.07 and 252.62

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Solution

The fourth proportional to 399.91, 552.07 and 252.62 is: 348.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    399.91 : 552.07 = 252.62 : x
  2. Step 2: Convert to fraction form
    399.91/552.07 = 252.62/x
  3. Step 3: Cross multiply
    399.91x = 552.07 × 252.62
  4. Step 4: Simplify right side
    399.91x = 139,463.92
  5. Step 5: Solve for x
    x = 139,463.92/399.91
  6. Step 6: Final answer
    x = 348.74

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.