Home / 1,286.55-1,927.23-1,220.13

Finding the Fourth Proportional to 1,286.55, 1,927.23 and 1,220.13

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Solution

The fourth proportional to 1,286.55, 1,927.23 and 1,220.13 is: 1,827.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,286.55 : 1,927.23 = 1,220.13 : x
  2. Step 2: Convert to fraction form
    1,286.55/1,927.23 = 1,220.13/x
  3. Step 3: Cross multiply
    1,286.55x = 1,927.23 × 1,220.13
  4. Step 4: Simplify right side
    1,286.55x = 2,351,471.14
  5. Step 5: Solve for x
    x = 2,351,471.14/1,286.55
  6. Step 6: Final answer
    x = 1,827.73

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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.