Home / 3,859.43-5,318.30-2,678.45

Finding the Fourth Proportional to 3,859.43, 5,318.30 and 2,678.45

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Solution

The fourth proportional to 3,859.43, 5,318.30 and 2,678.45 is: 3,690.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,859.43 : 5,318.30 = 2,678.45 : x
  2. Step 2: Convert to fraction form
    3,859.43/5,318.30 = 2,678.45/x
  3. Step 3: Cross multiply
    3,859.43x = 5,318.30 × 2,678.45
  4. Step 4: Simplify right side
    3,859.43x = 14,244,760.65
  5. Step 5: Solve for x
    x = 14,244,760.65/3,859.43
  6. Step 6: Final answer
    x = 3,690.90

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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.