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Finding the Fourth Proportional to 1,322.13, 1,982.84 and 671.97

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Solution

The fourth proportional to 1,322.13, 1,982.84 and 671.97 is: 1,007.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,322.13 : 1,982.84 = 671.97 : x
  2. Step 2: Convert to fraction form
    1,322.13/1,982.84 = 671.97/x
  3. Step 3: Cross multiply
    1,322.13x = 1,982.84 × 671.97
  4. Step 4: Simplify right side
    1,322.13x = 1,332,405.63
  5. Step 5: Solve for x
    x = 1,332,405.63/1,322.13
  6. Step 6: Final answer
    x = 1,007.77

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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.