Home / 3,786.75-5,680.13-1,320.91

Finding the Fourth Proportional to 3,786.75, 5,680.13 and 1,320.91

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Solution

The fourth proportional to 3,786.75, 5,680.13 and 1,320.91 is: 1,981.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,786.75 : 5,680.13 = 1,320.91 : x
  2. Step 2: Convert to fraction form
    3,786.75/5,680.13 = 1,320.91/x
  3. Step 3: Cross multiply
    3,786.75x = 5,680.13 × 1,320.91
  4. Step 4: Simplify right side
    3,786.75x = 7,502,919.71
  5. Step 5: Solve for x
    x = 7,502,919.71/3,786.75
  6. Step 6: Final answer
    x = 1,981.36

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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.