Home / 2,391.24-3,299.76-1,396.80

Finding the Fourth Proportional to 2,391.24, 3,299.76 and 1,396.80

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Solution

The fourth proportional to 2,391.24, 3,299.76 and 1,396.80 is: 1,927.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,391.24 : 3,299.76 = 1,396.80 : x
  2. Step 2: Convert to fraction form
    2,391.24/3,299.76 = 1,396.80/x
  3. Step 3: Cross multiply
    2,391.24x = 3,299.76 × 1,396.80
  4. Step 4: Simplify right side
    2,391.24x = 4,609,104.77
  5. Step 5: Solve for x
    x = 4,609,104.77/2,391.24
  6. Step 6: Final answer
    x = 1,927.50

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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.