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Finding the Fourth Proportional to 563.92, 778.08 and 331.12

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Solution

The fourth proportional to 563.92, 778.08 and 331.12 is: 456.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    563.92 : 778.08 = 331.12 : x
  2. Step 2: Convert to fraction form
    563.92/778.08 = 331.12/x
  3. Step 3: Cross multiply
    563.92x = 778.08 × 331.12
  4. Step 4: Simplify right side
    563.92x = 257,637.85
  5. Step 5: Solve for x
    x = 257,637.85/563.92
  6. Step 6: Final answer
    x = 456.87

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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.