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Finding the Fourth Proportional to 327.62, 491.40 and 309.56

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Solution

The fourth proportional to 327.62, 491.40 and 309.56 is: 464.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    327.62 : 491.40 = 309.56 : x
  2. Step 2: Convert to fraction form
    327.62/491.40 = 309.56/x
  3. Step 3: Cross multiply
    327.62x = 491.40 × 309.56
  4. Step 4: Simplify right side
    327.62x = 152,115.33
  5. Step 5: Solve for x
    x = 152,115.33/327.62
  6. Step 6: Final answer
    x = 464.30

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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.