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Finding the Fourth Proportional to 4,969.79, 6,857.97 and 2,979.35

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Solution

The fourth proportional to 4,969.79, 6,857.97 and 2,979.35 is: 4,111.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,969.79 : 6,857.97 = 2,979.35 : x
  2. Step 2: Convert to fraction form
    4,969.79/6,857.97 = 2,979.35/x
  3. Step 3: Cross multiply
    4,969.79x = 6,857.97 × 2,979.35
  4. Step 4: Simplify right side
    4,969.79x = 20,432,292.92
  5. Step 5: Solve for x
    x = 20,432,292.92/4,969.79
  6. Step 6: Final answer
    x = 4,111.30

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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.