Home / 1,217.27-1,678.52-1,099.22

Finding the Fourth Proportional to 1,217.27, 1,678.52 and 1,099.22

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Solution

The fourth proportional to 1,217.27, 1,678.52 and 1,099.22 is: 1,515.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,217.27 : 1,678.52 = 1,099.22 : x
  2. Step 2: Convert to fraction form
    1,217.27/1,678.52 = 1,099.22/x
  3. Step 3: Cross multiply
    1,217.27x = 1,678.52 × 1,099.22
  4. Step 4: Simplify right side
    1,217.27x = 1,845,057.11
  5. Step 5: Solve for x
    x = 1,845,057.11/1,217.27
  6. Step 6: Final answer
    x = 1,515.73

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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.