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Finding the Fourth Proportional to 323.60, 446.56 and 309

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Solution

The fourth proportional to 323.60, 446.56 and 309 is: 426.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    323.60 : 446.56 = 309 : x
  2. Step 2: Convert to fraction form
    323.60/446.56 = 309/x
  3. Step 3: Cross multiply
    323.60x = 446.56 × 309
  4. Step 4: Simplify right side
    323.60x = 137,987.04
  5. Step 5: Solve for x
    x = 137,987.04/323.60
  6. Step 6: Final answer
    x = 426.41

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.