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Finding the Fourth Proportional to 886.68, 1,321.11 and 837

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Solution

The fourth proportional to 886.68, 1,321.11 and 837 is: 1,247.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    886.68 : 1,321.11 = 837 : x
  2. Step 2: Convert to fraction form
    886.68/1,321.11 = 837/x
  3. Step 3: Cross multiply
    886.68x = 1,321.11 × 837
  4. Step 4: Simplify right side
    886.68x = 1,105,769.07
  5. Step 5: Solve for x
    x = 1,105,769.07/886.68
  6. Step 6: Final answer
    x = 1,247.09

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.