Home / 2,072.88-2,860.47-1,286.91

Finding the Fourth Proportional to 2,072.88, 2,860.47 and 1,286.91

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Solution

The fourth proportional to 2,072.88, 2,860.47 and 1,286.91 is: 1,775.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,072.88 : 2,860.47 = 1,286.91 : x
  2. Step 2: Convert to fraction form
    2,072.88/2,860.47 = 1,286.91/x
  3. Step 3: Cross multiply
    2,072.88x = 2,860.47 × 1,286.91
  4. Step 4: Simplify right side
    2,072.88x = 3,681,167.45
  5. Step 5: Solve for x
    x = 3,681,167.45/2,072.88
  6. Step 6: Final answer
    x = 1,775.87

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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.