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Finding the Fourth Proportional to 961.26, 1,326.30 and 662.76

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Solution

The fourth proportional to 961.26, 1,326.30 and 662.76 is: 914.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    961.26 : 1,326.30 = 662.76 : x
  2. Step 2: Convert to fraction form
    961.26/1,326.30 = 662.76/x
  3. Step 3: Cross multiply
    961.26x = 1,326.30 × 662.76
  4. Step 4: Simplify right side
    961.26x = 879,018.59
  5. Step 5: Solve for x
    x = 879,018.59/961.26
  6. Step 6: Final answer
    x = 914.44

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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.