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Finding the Fourth Proportional to 4,879.78, 6,734.96 and 2,891.32

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Solution

The fourth proportional to 4,879.78, 6,734.96 and 2,891.32 is: 3,990.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,879.78 : 6,734.96 = 2,891.32 : x
  2. Step 2: Convert to fraction form
    4,879.78/6,734.96 = 2,891.32/x
  3. Step 3: Cross multiply
    4,879.78x = 6,734.96 × 2,891.32
  4. Step 4: Simplify right side
    4,879.78x = 19,472,924.55
  5. Step 5: Solve for x
    x = 19,472,924.55/4,879.78
  6. Step 6: Final answer
    x = 3,990.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.