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Finding the Fourth Proportional to 1,321.82, 1,982.08 and 444.02

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Solution

The fourth proportional to 1,321.82, 1,982.08 and 444.02 is: 665.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,321.82 : 1,982.08 = 444.02 : x
  2. Step 2: Convert to fraction form
    1,321.82/1,982.08 = 444.02/x
  3. Step 3: Cross multiply
    1,321.82x = 1,982.08 × 444.02
  4. Step 4: Simplify right side
    1,321.82x = 880,083.16
  5. Step 5: Solve for x
    x = 880,083.16/1,321.82
  6. Step 6: Final answer
    x = 665.81

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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.