Home / 1,786.23-2,679.35-487.71

Finding the Fourth Proportional to 1,786.23, 2,679.35 and 487.71

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Solution

The fourth proportional to 1,786.23, 2,679.35 and 487.71 is: 731.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,786.23 : 2,679.35 = 487.71 : x
  2. Step 2: Convert to fraction form
    1,786.23/2,679.35 = 487.71/x
  3. Step 3: Cross multiply
    1,786.23x = 2,679.35 × 487.71
  4. Step 4: Simplify right side
    1,786.23x = 1,306,745.79
  5. Step 5: Solve for x
    x = 1,306,745.79/1,786.23
  6. Step 6: Final answer
    x = 731.57

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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.