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Finding the Fourth Proportional to 323.50, 485.65 and 306.49

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Solution

The fourth proportional to 323.50, 485.65 and 306.49 is: 460.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    323.50 : 485.65 = 306.49 : x
  2. Step 2: Convert to fraction form
    323.50/485.65 = 306.49/x
  3. Step 3: Cross multiply
    323.50x = 485.65 × 306.49
  4. Step 4: Simplify right side
    323.50x = 148,846.87
  5. Step 5: Solve for x
    x = 148,846.87/323.50
  6. Step 6: Final answer
    x = 460.11

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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.