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Finding the Fourth Proportional to 1,266.69, 1,747.81 and 847.65

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Solution

The fourth proportional to 1,266.69, 1,747.81 and 847.65 is: 1,169.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,266.69 : 1,747.81 = 847.65 : x
  2. Step 2: Convert to fraction form
    1,266.69/1,747.81 = 847.65/x
  3. Step 3: Cross multiply
    1,266.69x = 1,747.81 × 847.65
  4. Step 4: Simplify right side
    1,266.69x = 1,481,531.15
  5. Step 5: Solve for x
    x = 1,481,531.15/1,266.69
  6. Step 6: Final answer
    x = 1,169.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.