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Finding the Fourth Proportional to 609.62, 914.43 and 219.68

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Solution

The fourth proportional to 609.62, 914.43 and 219.68 is: 329.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    609.62 : 914.43 = 219.68 : x
  2. Step 2: Convert to fraction form
    609.62/914.43 = 219.68/x
  3. Step 3: Cross multiply
    609.62x = 914.43 × 219.68
  4. Step 4: Simplify right side
    609.62x = 200,877.41
  5. Step 5: Solve for x
    x = 200,877.41/609.62
  6. Step 6: Final answer
    x = 329.51

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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.