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Finding the Fourth Proportional to 613.39, 919.85 and 223.26

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Solution

The fourth proportional to 613.39, 919.85 and 223.26 is: 334.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.39 : 919.85 = 223.26 : x
  2. Step 2: Convert to fraction form
    613.39/919.85 = 223.26/x
  3. Step 3: Cross multiply
    613.39x = 919.85 × 223.26
  4. Step 4: Simplify right side
    613.39x = 205,362.24
  5. Step 5: Solve for x
    x = 205,362.24/613.39
  6. Step 6: Final answer
    x = 334.80

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Double scale
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Similar ratio
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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.