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Finding the Fourth Proportional to 800.08, 1,103.20 and 563.95

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Solution

The fourth proportional to 800.08, 1,103.20 and 563.95 is: 777.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    800.08 : 1,103.20 = 563.95 : x
  2. Step 2: Convert to fraction form
    800.08/1,103.20 = 563.95/x
  3. Step 3: Cross multiply
    800.08x = 1,103.20 × 563.95
  4. Step 4: Simplify right side
    800.08x = 622,149.64
  5. Step 5: Solve for x
    x = 622,149.64/800.08
  6. Step 6: Final answer
    x = 777.61

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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.