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Finding the Fourth Proportional to 825.73, 1,139.34 and 563.83

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Solution

The fourth proportional to 825.73, 1,139.34 and 563.83 is: 777.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    825.73 : 1,139.34 = 563.83 : x
  2. Step 2: Convert to fraction form
    825.73/1,139.34 = 563.83/x
  3. Step 3: Cross multiply
    825.73x = 1,139.34 × 563.83
  4. Step 4: Simplify right side
    825.73x = 642,394.07
  5. Step 5: Solve for x
    x = 642,394.07/825.73
  6. Step 6: Final answer
    x = 777.97

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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.