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Finding the Fourth Proportional to 4,879.76, 6,736.92 and 3,112.88

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Solution

The fourth proportional to 4,879.76, 6,736.92 and 3,112.88 is: 4,297.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,879.76 : 6,736.92 = 3,112.88 : x
  2. Step 2: Convert to fraction form
    4,879.76/6,736.92 = 3,112.88/x
  3. Step 3: Cross multiply
    4,879.76x = 6,736.92 × 3,112.88
  4. Step 4: Simplify right side
    4,879.76x = 20,971,223.53
  5. Step 5: Solve for x
    x = 20,971,223.53/4,879.76
  6. Step 6: Final answer
    x = 4,297.59

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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.