Home / 3,786.67-5,680.28-1,321.57

Finding the Fourth Proportional to 3,786.67, 5,680.28 and 1,321.57

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Solution

The fourth proportional to 3,786.67, 5,680.28 and 1,321.57 is: 1,982.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,786.67 : 5,680.28 = 1,321.57 : x
  2. Step 2: Convert to fraction form
    3,786.67/5,680.28 = 1,321.57/x
  3. Step 3: Cross multiply
    3,786.67x = 5,680.28 × 1,321.57
  4. Step 4: Simplify right side
    3,786.67x = 7,506,887.64
  5. Step 5: Solve for x
    x = 7,506,887.64/3,786.67
  6. Step 6: Final answer
    x = 1,982.45

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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.