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Finding the Fourth Proportional to 2,728.35, 4,092.93 and 878.85

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Solution

The fourth proportional to 2,728.35, 4,092.93 and 878.85 is: 1,318.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,728.35 : 4,092.93 = 878.85 : x
  2. Step 2: Convert to fraction form
    2,728.35/4,092.93 = 878.85/x
  3. Step 3: Cross multiply
    2,728.35x = 4,092.93 × 878.85
  4. Step 4: Simplify right side
    2,728.35x = 3,597,071.53
  5. Step 5: Solve for x
    x = 3,597,071.53/2,728.35
  6. Step 6: Final answer
    x = 1,318.41

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1.5x scale

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.