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Finding the Fourth Proportional to 366.91, 551.06 and 213.15

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Solution

The fourth proportional to 366.91, 551.06 and 213.15 is: 320.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    366.91 : 551.06 = 213.15 : x
  2. Step 2: Convert to fraction form
    366.91/551.06 = 213.15/x
  3. Step 3: Cross multiply
    366.91x = 551.06 × 213.15
  4. Step 4: Simplify right side
    366.91x = 117,458.44
  5. Step 5: Solve for x
    x = 117,458.44/366.91
  6. Step 6: Final answer
    x = 320.13

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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.