Home / 3,785.70-5,677.80-1,320.66

Finding the Fourth Proportional to 3,785.70, 5,677.80 and 1,320.66

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Solution

The fourth proportional to 3,785.70, 5,677.80 and 1,320.66 is: 1,980.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,785.70 : 5,677.80 = 1,320.66 : x
  2. Step 2: Convert to fraction form
    3,785.70/5,677.80 = 1,320.66/x
  3. Step 3: Cross multiply
    3,785.70x = 5,677.80 × 1,320.66
  4. Step 4: Simplify right side
    3,785.70x = 7,498,443.35
  5. Step 5: Solve for x
    x = 7,498,443.35/3,785.70
  6. Step 6: Final answer
    x = 1,980.73

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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.