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Finding the Fourth Proportional to 2,797.75, 3,860.90 and 1,618.91

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Solution

The fourth proportional to 2,797.75, 3,860.90 and 1,618.91 is: 2,234.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,797.75 : 3,860.90 = 1,618.91 : x
  2. Step 2: Convert to fraction form
    2,797.75/3,860.90 = 1,618.91/x
  3. Step 3: Cross multiply
    2,797.75x = 3,860.90 × 1,618.91
  4. Step 4: Simplify right side
    2,797.75x = 6,250,449.62
  5. Step 5: Solve for x
    x = 6,250,449.62/2,797.75
  6. Step 6: Final answer
    x = 2,234.10

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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.