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Finding the Fourth Proportional to 961.89, 1,326.65 and 696.37

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Solution

The fourth proportional to 961.89, 1,326.65 and 696.37 is: 960.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    961.89 : 1,326.65 = 696.37 : x
  2. Step 2: Convert to fraction form
    961.89/1,326.65 = 696.37/x
  3. Step 3: Cross multiply
    961.89x = 1,326.65 × 696.37
  4. Step 4: Simplify right side
    961.89x = 923,838.87
  5. Step 5: Solve for x
    x = 923,838.87/961.89
  6. Step 6: Final answer
    x = 960.44

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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.