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Finding the Fourth Proportional to 456.12, 685.08 and 443.34

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Solution

The fourth proportional to 456.12, 685.08 and 443.34 is: 665.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    456.12 : 685.08 = 443.34 : x
  2. Step 2: Convert to fraction form
    456.12/685.08 = 443.34/x
  3. Step 3: Cross multiply
    456.12x = 685.08 × 443.34
  4. Step 4: Simplify right side
    456.12x = 303,723.37
  5. Step 5: Solve for x
    x = 303,723.37/456.12
  6. Step 6: Final answer
    x = 665.88

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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.