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Finding the Fourth Proportional to 1,320.16, 1,982.04 and 743.44

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Solution

The fourth proportional to 1,320.16, 1,982.04 and 743.44 is: 1,116.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,320.16 : 1,982.04 = 743.44 : x
  2. Step 2: Convert to fraction form
    1,320.16/1,982.04 = 743.44/x
  3. Step 3: Cross multiply
    1,320.16x = 1,982.04 × 743.44
  4. Step 4: Simplify right side
    1,320.16x = 1,473,527.82
  5. Step 5: Solve for x
    x = 1,473,527.82/1,320.16
  6. Step 6: Final answer
    x = 1,116.17

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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.