Home / 3,815.70-5,721.57-1,218.30

Finding the Fourth Proportional to 3,815.70, 5,721.57 and 1,218.30

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Solution

The fourth proportional to 3,815.70, 5,721.57 and 1,218.30 is: 1,826.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,815.70 : 5,721.57 = 1,218.30 : x
  2. Step 2: Convert to fraction form
    3,815.70/5,721.57 = 1,218.30/x
  3. Step 3: Cross multiply
    3,815.70x = 5,721.57 × 1,218.30
  4. Step 4: Simplify right side
    3,815.70x = 6,970,588.73
  5. Step 5: Solve for x
    x = 6,970,588.73/3,815.70
  6. Step 6: Final answer
    x = 1,826.82

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1.5x scale

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.