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Finding the Fourth Proportional to 1,306.85, 1,960.56 and 758.03

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Solution

The fourth proportional to 1,306.85, 1,960.56 and 758.03 is: 1,137.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,306.85 : 1,960.56 = 758.03 : x
  2. Step 2: Convert to fraction form
    1,306.85/1,960.56 = 758.03/x
  3. Step 3: Cross multiply
    1,306.85x = 1,960.56 × 758.03
  4. Step 4: Simplify right side
    1,306.85x = 1,486,153.49
  5. Step 5: Solve for x
    x = 1,486,153.49/1,306.85
  6. Step 6: Final answer
    x = 1,137.21

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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.