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Finding the Fourth Proportional to 400.86, 553.46 and 251.54

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Solution

The fourth proportional to 400.86, 553.46 and 251.54 is: 347.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    400.86 : 553.46 = 251.54 : x
  2. Step 2: Convert to fraction form
    400.86/553.46 = 251.54/x
  3. Step 3: Cross multiply
    400.86x = 553.46 × 251.54
  4. Step 4: Simplify right side
    400.86x = 139,217.33
  5. Step 5: Solve for x
    x = 139,217.33/400.86
  6. Step 6: Final answer
    x = 347.30

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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.