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Finding the Fourth Proportional to 826.75, 1,235.55 and 663.67

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Solution

The fourth proportional to 826.75, 1,235.55 and 663.67 is: 991.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    826.75 : 1,235.55 = 663.67 : x
  2. Step 2: Convert to fraction form
    826.75/1,235.55 = 663.67/x
  3. Step 3: Cross multiply
    826.75x = 1,235.55 × 663.67
  4. Step 4: Simplify right side
    826.75x = 819,997.47
  5. Step 5: Solve for x
    x = 819,997.47/826.75
  6. Step 6: Final answer
    x = 991.83

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.