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Finding the Fourth Proportional to 1,286.52, 1,928.26 and 739.08

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Solution

The fourth proportional to 1,286.52, 1,928.26 and 739.08 is: 1,107.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,286.52 : 1,928.26 = 739.08 : x
  2. Step 2: Convert to fraction form
    1,286.52/1,928.26 = 739.08/x
  3. Step 3: Cross multiply
    1,286.52x = 1,928.26 × 739.08
  4. Step 4: Simplify right side
    1,286.52x = 1,425,138.40
  5. Step 5: Solve for x
    x = 1,425,138.40/1,286.52
  6. Step 6: Final answer
    x = 1,107.75

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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.