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Finding the Fourth Proportional to 327.63, 491.08 and 211.80

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Solution

The fourth proportional to 327.63, 491.08 and 211.80 is: 317.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    327.63 : 491.08 = 211.80 : x
  2. Step 2: Convert to fraction form
    327.63/491.08 = 211.80/x
  3. Step 3: Cross multiply
    327.63x = 491.08 × 211.80
  4. Step 4: Simplify right side
    327.63x = 104,010.74
  5. Step 5: Solve for x
    x = 104,010.74/327.63
  6. Step 6: Final answer
    x = 317.46

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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.