Home / 3,115.65-4,299.81-1,789.68

Finding the Fourth Proportional to 3,115.65, 4,299.81 and 1,789.68

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Solution

The fourth proportional to 3,115.65, 4,299.81 and 1,789.68 is: 2,469.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,115.65 : 4,299.81 = 1,789.68 : x
  2. Step 2: Convert to fraction form
    3,115.65/4,299.81 = 1,789.68/x
  3. Step 3: Cross multiply
    3,115.65x = 4,299.81 × 1,789.68
  4. Step 4: Simplify right side
    3,115.65x = 7,695,283.96
  5. Step 5: Solve for x
    x = 7,695,283.96/3,115.65
  6. Step 6: Final answer
    x = 2,469.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.