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Finding the Fourth Proportional to 1,322.74, 1,982.76 and 835.12

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Solution

The fourth proportional to 1,322.74, 1,982.76 and 835.12 is: 1,251.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,322.74 : 1,982.76 = 835.12 : x
  2. Step 2: Convert to fraction form
    1,322.74/1,982.76 = 835.12/x
  3. Step 3: Cross multiply
    1,322.74x = 1,982.76 × 835.12
  4. Step 4: Simplify right side
    1,322.74x = 1,655,842.53
  5. Step 5: Solve for x
    x = 1,655,842.53/1,322.74
  6. Step 6: Final answer
    x = 1,251.83

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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.