Home / 1,122.18-1,545.39-1,118.53

Finding the Fourth Proportional to 1,122.18, 1,545.39 and 1,118.53

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Solution

The fourth proportional to 1,122.18, 1,545.39 and 1,118.53 is: 1,540.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,122.18 : 1,545.39 = 1,118.53 : x
  2. Step 2: Convert to fraction form
    1,122.18/1,545.39 = 1,118.53/x
  3. Step 3: Cross multiply
    1,122.18x = 1,545.39 × 1,118.53
  4. Step 4: Simplify right side
    1,122.18x = 1,728,565.08
  5. Step 5: Solve for x
    x = 1,728,565.08/1,122.18
  6. Step 6: Final answer
    x = 1,540.36

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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.