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Finding the Fourth Proportional to 826.11, 1,139.99 and 453.11

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Solution

The fourth proportional to 826.11, 1,139.99 and 453.11 is: 625.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    826.11 : 1,139.99 = 453.11 : x
  2. Step 2: Convert to fraction form
    826.11/1,139.99 = 453.11/x
  3. Step 3: Cross multiply
    826.11x = 1,139.99 × 453.11
  4. Step 4: Simplify right side
    826.11x = 516,532.90
  5. Step 5: Solve for x
    x = 516,532.90/826.11
  6. Step 6: Final answer
    x = 625.26

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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.