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Finding the Fourth Proportional to 400.05, 551.75 and 252.72

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Solution

The fourth proportional to 400.05, 551.75 and 252.72 is: 348.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    400.05 : 551.75 = 252.72 : x
  2. Step 2: Convert to fraction form
    400.05/551.75 = 252.72/x
  3. Step 3: Cross multiply
    400.05x = 551.75 × 252.72
  4. Step 4: Simplify right side
    400.05x = 139,437.00
  5. Step 5: Solve for x
    x = 139,437.00/400.05
  6. Step 6: Final answer
    x = 348.55

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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.