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Finding the Fourth Proportional to 5,057.66, 6,979.78 and 2,819.53

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Solution

The fourth proportional to 5,057.66, 6,979.78 and 2,819.53 is: 3,891.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,057.66 : 6,979.78 = 2,819.53 : x
  2. Step 2: Convert to fraction form
    5,057.66/6,979.78 = 2,819.53/x
  3. Step 3: Cross multiply
    5,057.66x = 6,979.78 × 2,819.53
  4. Step 4: Simplify right side
    5,057.66x = 19,679,699.10
  5. Step 5: Solve for x
    x = 19,679,699.10/5,057.66
  6. Step 6: Final answer
    x = 3,891.07

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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.