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Finding the Fourth Proportional to 961.38, 1,326.92 and 612

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Solution

The fourth proportional to 961.38, 1,326.92 and 612 is: 844.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    961.38 : 1,326.92 = 612 : x
  2. Step 2: Convert to fraction form
    961.38/1,326.92 = 612/x
  3. Step 3: Cross multiply
    961.38x = 1,326.92 × 612
  4. Step 4: Simplify right side
    961.38x = 812,071.98
  5. Step 5: Solve for x
    x = 812,071.98/961.38
  6. Step 6: Final answer
    x = 844.69

Related Problems

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Double scale
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Similar ratio
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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.