Home / 1,286.24-1,928.16-700.38

Finding the Fourth Proportional to 1,286.24, 1,928.16 and 700.38

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Solution

The fourth proportional to 1,286.24, 1,928.16 and 700.38 is: 1,049.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,286.24 : 1,928.16 = 700.38 : x
  2. Step 2: Convert to fraction form
    1,286.24/1,928.16 = 700.38/x
  3. Step 3: Cross multiply
    1,286.24x = 1,928.16 × 700.38
  4. Step 4: Simplify right side
    1,286.24x = 1,350,444.70
  5. Step 5: Solve for x
    x = 1,350,444.70/1,286.24
  6. Step 6: Final answer
    x = 1,049.92

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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.