Home / 2,766.78-3,812.90-1,979.46

Finding the Fourth Proportional to 2,766.78, 3,812.90 and 1,979.46

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Solution

The fourth proportional to 2,766.78, 3,812.90 and 1,979.46 is: 2,727.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,766.78 : 3,812.90 = 1,979.46 : x
  2. Step 2: Convert to fraction form
    2,766.78/3,812.90 = 1,979.46/x
  3. Step 3: Cross multiply
    2,766.78x = 3,812.90 × 1,979.46
  4. Step 4: Simplify right side
    2,766.78x = 7,547,473.14
  5. Step 5: Solve for x
    x = 7,547,473.14/2,766.78
  6. Step 6: Final answer
    x = 2,727.89

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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.