Home / 1,121.93-1,545.05-1,118.28

Finding the Fourth Proportional to 1,121.93, 1,545.05 and 1,118.28

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Solution

The fourth proportional to 1,121.93, 1,545.05 and 1,118.28 is: 1,540.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,121.93 : 1,545.05 = 1,118.28 : x
  2. Step 2: Convert to fraction form
    1,121.93/1,545.05 = 1,118.28/x
  3. Step 3: Cross multiply
    1,121.93x = 1,545.05 × 1,118.28
  4. Step 4: Simplify right side
    1,121.93x = 1,727,798.51
  5. Step 5: Solve for x
    x = 1,727,798.51/1,121.93
  6. Step 6: Final answer
    x = 1,540.02

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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.