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Finding the Fourth Proportional to 829.96, 1,244.94 and 213.66

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Solution

The fourth proportional to 829.96, 1,244.94 and 213.66 is: 320.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    829.96 : 1,244.94 = 213.66 : x
  2. Step 2: Convert to fraction form
    829.96/1,244.94 = 213.66/x
  3. Step 3: Cross multiply
    829.96x = 1,244.94 × 213.66
  4. Step 4: Simplify right side
    829.96x = 265,993.68
  5. Step 5: Solve for x
    x = 265,993.68/829.96
  6. Step 6: Final answer
    x = 320.49

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.