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Finding the Fourth Proportional to 1,227.96, 1,694.47 and 696.70

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Solution

The fourth proportional to 1,227.96, 1,694.47 and 696.70 is: 961.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,227.96 : 1,694.47 = 696.70 : x
  2. Step 2: Convert to fraction form
    1,227.96/1,694.47 = 696.70/x
  3. Step 3: Cross multiply
    1,227.96x = 1,694.47 × 696.70
  4. Step 4: Simplify right side
    1,227.96x = 1,180,537.25
  5. Step 5: Solve for x
    x = 1,180,537.25/1,227.96
  6. Step 6: Final answer
    x = 961.38

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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.