Home / 4,189.78-5,782.35-2,678.71

Finding the Fourth Proportional to 4,189.78, 5,782.35 and 2,678.71

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Solution

The fourth proportional to 4,189.78, 5,782.35 and 2,678.71 is: 3,696.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,189.78 : 5,782.35 = 2,678.71 : x
  2. Step 2: Convert to fraction form
    4,189.78/5,782.35 = 2,678.71/x
  3. Step 3: Cross multiply
    4,189.78x = 5,782.35 × 2,678.71
  4. Step 4: Simplify right side
    4,189.78x = 15,489,238.77
  5. Step 5: Solve for x
    x = 15,489,238.77/4,189.78
  6. Step 6: Final answer
    x = 3,696.91

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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.