Home / 1,143.50-1,715.39-1,081.22

Finding the Fourth Proportional to 1,143.50, 1,715.39 and 1,081.22

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Solution

The fourth proportional to 1,143.50, 1,715.39 and 1,081.22 is: 1,621.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,143.50 : 1,715.39 = 1,081.22 : x
  2. Step 2: Convert to fraction form
    1,143.50/1,715.39 = 1,081.22/x
  3. Step 3: Cross multiply
    1,143.50x = 1,715.39 × 1,081.22
  4. Step 4: Simplify right side
    1,143.50x = 1,854,713.98
  5. Step 5: Solve for x
    x = 1,854,713.98/1,143.50
  6. Step 6: Final answer
    x = 1,621.96

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.