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Finding the Fourth Proportional to 5,057.64, 6,979.64 and 2,819.72

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Solution

The fourth proportional to 5,057.64, 6,979.64 and 2,819.72 is: 3,891.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,057.64 : 6,979.64 = 2,819.72 : x
  2. Step 2: Convert to fraction form
    5,057.64/6,979.64 = 2,819.72/x
  3. Step 3: Cross multiply
    5,057.64x = 6,979.64 × 2,819.72
  4. Step 4: Simplify right side
    5,057.64x = 19,680,630.50
  5. Step 5: Solve for x
    x = 19,680,630.50/5,057.64
  6. Step 6: Final answer
    x = 3,891.27

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1.5x scale

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.