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Finding the Fourth Proportional to 826.94, 1,139.58 and 617.36

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Solution

The fourth proportional to 826.94, 1,139.58 and 617.36 is: 850.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    826.94 : 1,139.58 = 617.36 : x
  2. Step 2: Convert to fraction form
    826.94/1,139.58 = 617.36/x
  3. Step 3: Cross multiply
    826.94x = 1,139.58 × 617.36
  4. Step 4: Simplify right side
    826.94x = 703,531.11
  5. Step 5: Solve for x
    x = 703,531.11/826.94
  6. Step 6: Final answer
    x = 850.76

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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.