Home / 1,243.92-1,855.32-1,222.05

Finding the Fourth Proportional to 1,243.92, 1,855.32 and 1,222.05

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Solution

The fourth proportional to 1,243.92, 1,855.32 and 1,222.05 is: 1,822.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,243.92 : 1,855.32 = 1,222.05 : x
  2. Step 2: Convert to fraction form
    1,243.92/1,855.32 = 1,222.05/x
  3. Step 3: Cross multiply
    1,243.92x = 1,855.32 × 1,222.05
  4. Step 4: Simplify right side
    1,243.92x = 2,267,293.81
  5. Step 5: Solve for x
    x = 2,267,293.81/1,243.92
  6. Step 6: Final answer
    x = 1,822.70

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.