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Finding the Fourth Proportional to 397.81, 596.26 and 214.80

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Solution

The fourth proportional to 397.81, 596.26 and 214.80 is: 321.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    397.81 : 596.26 = 214.80 : x
  2. Step 2: Convert to fraction form
    397.81/596.26 = 214.80/x
  3. Step 3: Cross multiply
    397.81x = 596.26 × 214.80
  4. Step 4: Simplify right side
    397.81x = 128,076.65
  5. Step 5: Solve for x
    x = 128,076.65/397.81
  6. Step 6: Final answer
    x = 321.95

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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.