Home / 2,715.75-3,747.50-1,919.38

Finding the Fourth Proportional to 2,715.75, 3,747.50 and 1,919.38

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Solution

The fourth proportional to 2,715.75, 3,747.50 and 1,919.38 is: 2,648.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,715.75 : 3,747.50 = 1,919.38 : x
  2. Step 2: Convert to fraction form
    2,715.75/3,747.50 = 1,919.38/x
  3. Step 3: Cross multiply
    2,715.75x = 3,747.50 × 1,919.38
  4. Step 4: Simplify right side
    2,715.75x = 7,192,866.95
  5. Step 5: Solve for x
    x = 7,192,866.95/2,715.75
  6. Step 6: Final answer
    x = 2,648.57

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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.