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Finding the Fourth Proportional to 4,879.98, 6,734.40 and 2,641.86

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Solution

The fourth proportional to 4,879.98, 6,734.40 and 2,641.86 is: 3,645.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,879.98 : 6,734.40 = 2,641.86 : x
  2. Step 2: Convert to fraction form
    4,879.98/6,734.40 = 2,641.86/x
  3. Step 3: Cross multiply
    4,879.98x = 6,734.40 × 2,641.86
  4. Step 4: Simplify right side
    4,879.98x = 17,791,339.51
  5. Step 5: Solve for x
    x = 17,791,339.51/4,879.98
  6. Step 6: Final answer
    x = 3,645.78

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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.