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Finding the Fourth Proportional to 4,975.78, 6,866.52 and 2,879.86

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Solution

The fourth proportional to 4,975.78, 6,866.52 and 2,879.86 is: 3,974.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,975.78 : 6,866.52 = 2,879.86 : x
  2. Step 2: Convert to fraction form
    4,975.78/6,866.52 = 2,879.86/x
  3. Step 3: Cross multiply
    4,975.78x = 6,866.52 × 2,879.86
  4. Step 4: Simplify right side
    4,975.78x = 19,774,616.29
  5. Step 5: Solve for x
    x = 19,774,616.29/4,975.78
  6. Step 6: Final answer
    x = 3,974.17

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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.