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Finding the Fourth Proportional to 1,306.99, 1,960.83 and 758.65

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Solution

The fourth proportional to 1,306.99, 1,960.83 and 758.65 is: 1,138.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,306.99 : 1,960.83 = 758.65 : x
  2. Step 2: Convert to fraction form
    1,306.99/1,960.83 = 758.65/x
  3. Step 3: Cross multiply
    1,306.99x = 1,960.83 × 758.65
  4. Step 4: Simplify right side
    1,306.99x = 1,487,585.58
  5. Step 5: Solve for x
    x = 1,487,585.58/1,306.99
  6. Step 6: Final answer
    x = 1,138.17

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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.