Home / 2,318.55-3,478.97-1,085.78

Finding the Fourth Proportional to 2,318.55, 3,478.97 and 1,085.78

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Solution

The fourth proportional to 2,318.55, 3,478.97 and 1,085.78 is: 1,629.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,318.55 : 3,478.97 = 1,085.78 : x
  2. Step 2: Convert to fraction form
    2,318.55/3,478.97 = 1,085.78/x
  3. Step 3: Cross multiply
    2,318.55x = 3,478.97 × 1,085.78
  4. Step 4: Simplify right side
    2,318.55x = 3,777,399.32
  5. Step 5: Solve for x
    x = 3,777,399.32/2,318.55
  6. Step 6: Final answer
    x = 1,629.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.