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Finding the Fourth Proportional to 826.34, 1,236.60 and 565.11

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Solution

The fourth proportional to 826.34, 1,236.60 and 565.11 is: 845.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    826.34 : 1,236.60 = 565.11 : x
  2. Step 2: Convert to fraction form
    826.34/1,236.60 = 565.11/x
  3. Step 3: Cross multiply
    826.34x = 1,236.60 × 565.11
  4. Step 4: Simplify right side
    826.34x = 698,815.03
  5. Step 5: Solve for x
    x = 698,815.03/826.34
  6. Step 6: Final answer
    x = 845.68

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.