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Finding the Fourth Proportional to 1,099.45, 1,508.97 and 1,005.59

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Solution

The fourth proportional to 1,099.45, 1,508.97 and 1,005.59 is: 1,380.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,099.45 : 1,508.97 = 1,005.59 : x
  2. Step 2: Convert to fraction form
    1,099.45/1,508.97 = 1,005.59/x
  3. Step 3: Cross multiply
    1,099.45x = 1,508.97 × 1,005.59
  4. Step 4: Simplify right side
    1,099.45x = 1,517,412.69
  5. Step 5: Solve for x
    x = 1,517,412.69/1,099.45
  6. Step 6: Final answer
    x = 1,380.15

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.