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Finding the Fourth Proportional to 400.58, 551.61 and 371.54

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Solution

The fourth proportional to 400.58, 551.61 and 371.54 is: 511.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    400.58 : 551.61 = 371.54 : x
  2. Step 2: Convert to fraction form
    400.58/551.61 = 371.54/x
  3. Step 3: Cross multiply
    400.58x = 551.61 × 371.54
  4. Step 4: Simplify right side
    400.58x = 204,945.18
  5. Step 5: Solve for x
    x = 204,945.18/400.58
  6. Step 6: Final answer
    x = 511.62

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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.