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Finding the Fourth Proportional to 961.42, 1,326.77 and 547.42

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Solution

The fourth proportional to 961.42, 1,326.77 and 547.42 is: 755.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    961.42 : 1,326.77 = 547.42 : x
  2. Step 2: Convert to fraction form
    961.42/1,326.77 = 547.42/x
  3. Step 3: Cross multiply
    961.42x = 1,326.77 × 547.42
  4. Step 4: Simplify right side
    961.42x = 726,297.70
  5. Step 5: Solve for x
    x = 726,297.70/961.42
  6. Step 6: Final answer
    x = 755.44

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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.