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Finding the Fourth Proportional to 399.92, 551.67 and 252.50

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Solution

The fourth proportional to 399.92, 551.67 and 252.50 is: 348.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    399.92 : 551.67 = 252.50 : x
  2. Step 2: Convert to fraction form
    399.92/551.67 = 252.50/x
  3. Step 3: Cross multiply
    399.92x = 551.67 × 252.50
  4. Step 4: Simplify right side
    399.92x = 139,296.68
  5. Step 5: Solve for x
    x = 139,296.68/399.92
  6. Step 6: Final answer
    x = 348.31

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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.