Home / 1,753.28-2,640.32-1,269.72

Finding the Fourth Proportional to 1,753.28, 2,640.32 and 1,269.72

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Solution

The fourth proportional to 1,753.28, 2,640.32 and 1,269.72 is: 1,912.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,753.28 : 2,640.32 = 1,269.72 : x
  2. Step 2: Convert to fraction form
    1,753.28/2,640.32 = 1,269.72/x
  3. Step 3: Cross multiply
    1,753.28x = 2,640.32 × 1,269.72
  4. Step 4: Simplify right side
    1,753.28x = 3,352,467.11
  5. Step 5: Solve for x
    x = 3,352,467.11/1,753.28
  6. Step 6: Final answer
    x = 1,912.11

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.