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Finding the Fourth Proportional to 2,799.99, 3,857.90 and 1,866.87

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Solution

The fourth proportional to 2,799.99, 3,857.90 and 1,866.87 is: 2,572.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,799.99 : 3,857.90 = 1,866.87 : x
  2. Step 2: Convert to fraction form
    2,799.99/3,857.90 = 1,866.87/x
  3. Step 3: Cross multiply
    2,799.99x = 3,857.90 × 1,866.87
  4. Step 4: Simplify right side
    2,799.99x = 7,202,188.44
  5. Step 5: Solve for x
    x = 7,202,188.44/2,799.99
  6. Step 6: Final answer
    x = 2,572.22

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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.