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Finding the Fourth Proportional to 4,980.79, 6,871.19 and 3,212.97

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Solution

The fourth proportional to 4,980.79, 6,871.19 and 3,212.97 is: 4,432.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,980.79 : 6,871.19 = 3,212.97 : x
  2. Step 2: Convert to fraction form
    4,980.79/6,871.19 = 3,212.97/x
  3. Step 3: Cross multiply
    4,980.79x = 6,871.19 × 3,212.97
  4. Step 4: Simplify right side
    4,980.79x = 22,076,894.09
  5. Step 5: Solve for x
    x = 22,076,894.09/4,980.79
  6. Step 6: Final answer
    x = 4,432.41

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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.