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Finding the Fourth Proportional to 886.38, 1,330.07 and 838.87

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Solution

The fourth proportional to 886.38, 1,330.07 and 838.87 is: 1,258.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    886.38 : 1,330.07 = 838.87 : x
  2. Step 2: Convert to fraction form
    886.38/1,330.07 = 838.87/x
  3. Step 3: Cross multiply
    886.38x = 1,330.07 × 838.87
  4. Step 4: Simplify right side
    886.38x = 1,115,759.15
  5. Step 5: Solve for x
    x = 1,115,759.15/886.38
  6. Step 6: Final answer
    x = 1,258.79

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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.