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Finding the Fourth Proportional to 2,886.67, 4,330.42 and 911.62

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Solution

The fourth proportional to 2,886.67, 4,330.42 and 911.62 is: 1,367.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,886.67 : 4,330.42 = 911.62 : x
  2. Step 2: Convert to fraction form
    2,886.67/4,330.42 = 911.62/x
  3. Step 3: Cross multiply
    2,886.67x = 4,330.42 × 911.62
  4. Step 4: Simplify right side
    2,886.67x = 3,947,697.48
  5. Step 5: Solve for x
    x = 3,947,697.48/2,886.67
  6. Step 6: Final answer
    x = 1,367.56

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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.