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Finding the Fourth Proportional to 1,283.26, 1,770.78 and 759.19

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Solution

The fourth proportional to 1,283.26, 1,770.78 and 759.19 is: 1,047.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,283.26 : 1,770.78 = 759.19 : x
  2. Step 2: Convert to fraction form
    1,283.26/1,770.78 = 759.19/x
  3. Step 3: Cross multiply
    1,283.26x = 1,770.78 × 759.19
  4. Step 4: Simplify right side
    1,283.26x = 1,344,358.47
  5. Step 5: Solve for x
    x = 1,344,358.47/1,283.26
  6. Step 6: Final answer
    x = 1,047.61

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Double scale
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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.