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Finding the Fourth Proportional to 508.78, 701.09 and 331.54

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Solution

The fourth proportional to 508.78, 701.09 and 331.54 is: 456.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    508.78 : 701.09 = 331.54 : x
  2. Step 2: Convert to fraction form
    508.78/701.09 = 331.54/x
  3. Step 3: Cross multiply
    508.78x = 701.09 × 331.54
  4. Step 4: Simplify right side
    508.78x = 232,435.97
  5. Step 5: Solve for x
    x = 232,435.97/508.78
  6. Step 6: Final answer
    x = 456.85

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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.