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Finding the Fourth Proportional to 564.52, 778.78 and 351.97

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Solution

The fourth proportional to 564.52, 778.78 and 351.97 is: 485.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    564.52 : 778.78 = 351.97 : x
  2. Step 2: Convert to fraction form
    564.52/778.78 = 351.97/x
  3. Step 3: Cross multiply
    564.52x = 778.78 × 351.97
  4. Step 4: Simplify right side
    564.52x = 274,106.40
  5. Step 5: Solve for x
    x = 274,106.40/564.52
  6. Step 6: Final answer
    x = 485.56

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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.