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Finding the Fourth Proportional to 818.10, 1,227.20 and 270.33

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Solution

The fourth proportional to 818.10, 1,227.20 and 270.33 is: 405.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    818.10 : 1,227.20 = 270.33 : x
  2. Step 2: Convert to fraction form
    818.10/1,227.20 = 270.33/x
  3. Step 3: Cross multiply
    818.10x = 1,227.20 × 270.33
  4. Step 4: Simplify right side
    818.10x = 331,747.62
  5. Step 5: Solve for x
    x = 331,747.62/818.10
  6. Step 6: Final answer
    x = 405.51

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.