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Finding the Fourth Proportional to 827.08, 1,139.87 and 803.39

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Solution

The fourth proportional to 827.08, 1,139.87 and 803.39 is: 1,107.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    827.08 : 1,139.87 = 803.39 : x
  2. Step 2: Convert to fraction form
    827.08/1,139.87 = 803.39/x
  3. Step 3: Cross multiply
    827.08x = 1,139.87 × 803.39
  4. Step 4: Simplify right side
    827.08x = 915,756.47
  5. Step 5: Solve for x
    x = 915,756.47/827.08
  6. Step 6: Final answer
    x = 1,107.22

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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.