Home / 1,619.85-2,232.29-1,121.57

Finding the Fourth Proportional to 1,619.85, 2,232.29 and 1,121.57

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Solution

The fourth proportional to 1,619.85, 2,232.29 and 1,121.57 is: 1,545.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,619.85 : 2,232.29 = 1,121.57 : x
  2. Step 2: Convert to fraction form
    1,619.85/2,232.29 = 1,121.57/x
  3. Step 3: Cross multiply
    1,619.85x = 2,232.29 × 1,121.57
  4. Step 4: Simplify right side
    1,619.85x = 2,503,669.50
  5. Step 5: Solve for x
    x = 2,503,669.50/1,619.85
  6. Step 6: Final answer
    x = 1,545.62

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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.