Home / 2,315.88-3,195.78-1,321.16

Finding the Fourth Proportional to 2,315.88, 3,195.78 and 1,321.16

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Solution

The fourth proportional to 2,315.88, 3,195.78 and 1,321.16 is: 1,823.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,315.88 : 3,195.78 = 1,321.16 : x
  2. Step 2: Convert to fraction form
    2,315.88/3,195.78 = 1,321.16/x
  3. Step 3: Cross multiply
    2,315.88x = 3,195.78 × 1,321.16
  4. Step 4: Simplify right side
    2,315.88x = 4,222,136.70
  5. Step 5: Solve for x
    x = 4,222,136.70/2,315.88
  6. Step 6: Final answer
    x = 1,823.12

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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.