Home / 3,857.65-5,321.91-2,440.65

Finding the Fourth Proportional to 3,857.65, 5,321.91 and 2,440.65

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Solution

The fourth proportional to 3,857.65, 5,321.91 and 2,440.65 is: 3,367.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,857.65 : 5,321.91 = 2,440.65 : x
  2. Step 2: Convert to fraction form
    3,857.65/5,321.91 = 2,440.65/x
  3. Step 3: Cross multiply
    3,857.65x = 5,321.91 × 2,440.65
  4. Step 4: Simplify right side
    3,857.65x = 12,988,919.64
  5. Step 5: Solve for x
    x = 12,988,919.64/3,857.65
  6. Step 6: Final answer
    x = 3,367.05

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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.