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Finding the Fourth Proportional to 826.59, 1,140.67 and 494.85

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Solution

The fourth proportional to 826.59, 1,140.67 and 494.85 is: 682.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    826.59 : 1,140.67 = 494.85 : x
  2. Step 2: Convert to fraction form
    826.59/1,140.67 = 494.85/x
  3. Step 3: Cross multiply
    826.59x = 1,140.67 × 494.85
  4. Step 4: Simplify right side
    826.59x = 564,460.55
  5. Step 5: Solve for x
    x = 564,460.55/826.59
  6. Step 6: Final answer
    x = 682.88

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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.