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Finding the Fourth Proportional to 826.86, 1,140.55 and 616.82

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Solution

The fourth proportional to 826.86, 1,140.55 and 616.82 is: 850.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    826.86 : 1,140.55 = 616.82 : x
  2. Step 2: Convert to fraction form
    826.86/1,140.55 = 616.82/x
  3. Step 3: Cross multiply
    826.86x = 1,140.55 × 616.82
  4. Step 4: Simplify right side
    826.86x = 703,506.81
  5. Step 5: Solve for x
    x = 703,506.81/826.86
  6. Step 6: Final answer
    x = 850.82

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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.