Home / 1,872.24-2,809.44-718.80

Finding the Fourth Proportional to 1,872.24, 2,809.44 and 718.80

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Solution

The fourth proportional to 1,872.24, 2,809.44 and 718.80 is: 1,078.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,872.24 : 2,809.44 = 718.80 : x
  2. Step 2: Convert to fraction form
    1,872.24/2,809.44 = 718.80/x
  3. Step 3: Cross multiply
    1,872.24x = 2,809.44 × 718.80
  4. Step 4: Simplify right side
    1,872.24x = 2,019,425.47
  5. Step 5: Solve for x
    x = 2,019,425.47/1,872.24
  6. Step 6: Final answer
    x = 1,078.61

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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.