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Finding the Fourth Proportional to 842.72, 1,163.43 and 563.87

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Solution

The fourth proportional to 842.72, 1,163.43 and 563.87 is: 778.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    842.72 : 1,163.43 = 563.87 : x
  2. Step 2: Convert to fraction form
    842.72/1,163.43 = 563.87/x
  3. Step 3: Cross multiply
    842.72x = 1,163.43 × 563.87
  4. Step 4: Simplify right side
    842.72x = 656,026.18
  5. Step 5: Solve for x
    x = 656,026.18/842.72
  6. Step 6: Final answer
    x = 778.47

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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.