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Finding the Fourth Proportional to 662.46, 991.63 and 443.27

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Solution

The fourth proportional to 662.46, 991.63 and 443.27 is: 663.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    662.46 : 991.63 = 443.27 : x
  2. Step 2: Convert to fraction form
    662.46/991.63 = 443.27/x
  3. Step 3: Cross multiply
    662.46x = 991.63 × 443.27
  4. Step 4: Simplify right side
    662.46x = 439,559.83
  5. Step 5: Solve for x
    x = 439,559.83/662.46
  6. Step 6: Final answer
    x = 663.53

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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.