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Finding the Fourth Proportional to 630.30, 945.39 and 219.44

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Solution

The fourth proportional to 630.30, 945.39 and 219.44 is: 329.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.30 : 945.39 = 219.44 : x
  2. Step 2: Convert to fraction form
    630.30/945.39 = 219.44/x
  3. Step 3: Cross multiply
    630.30x = 945.39 × 219.44
  4. Step 4: Simplify right side
    630.30x = 207,451.65
  5. Step 5: Solve for x
    x = 207,451.65/630.30
  6. Step 6: Final answer
    x = 329.13

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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.