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Finding the Fourth Proportional to 1,099.44, 1,644.84 and 826.20

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Solution

The fourth proportional to 1,099.44, 1,644.84 and 826.20 is: 1,236.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,099.44 : 1,644.84 = 826.20 : x
  2. Step 2: Convert to fraction form
    1,099.44/1,644.84 = 826.20/x
  3. Step 3: Cross multiply
    1,099.44x = 1,644.84 × 826.20
  4. Step 4: Simplify right side
    1,099.44x = 1,358,966.81
  5. Step 5: Solve for x
    x = 1,358,966.81/1,099.44
  6. Step 6: Final answer
    x = 1,236.05

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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.