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Finding the Fourth Proportional to 2,786.69, 3,846.20 and 1,607.60

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Solution

The fourth proportional to 2,786.69, 3,846.20 and 1,607.60 is: 2,218.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,786.69 : 3,846.20 = 1,607.60 : x
  2. Step 2: Convert to fraction form
    2,786.69/3,846.20 = 1,607.60/x
  3. Step 3: Cross multiply
    2,786.69x = 3,846.20 × 1,607.60
  4. Step 4: Simplify right side
    2,786.69x = 6,183,123.85
  5. Step 5: Solve for x
    x = 6,183,123.85/2,786.69
  6. Step 6: Final answer
    x = 2,218.81

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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.