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Finding the Fourth Proportional to 1,324.33, 1,986.90 and 836.71

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Solution

The fourth proportional to 1,324.33, 1,986.90 and 836.71 is: 1,255.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,324.33 : 1,986.90 = 836.71 : x
  2. Step 2: Convert to fraction form
    1,324.33/1,986.90 = 836.71/x
  3. Step 3: Cross multiply
    1,324.33x = 1,986.90 × 836.71
  4. Step 4: Simplify right side
    1,324.33x = 1,662,459.10
  5. Step 5: Solve for x
    x = 1,662,459.10/1,324.33
  6. Step 6: Final answer
    x = 1,255.32

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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.