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Finding the Fourth Proportional to 2,179.87, 3,008.13 and 1,185.13

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Solution

The fourth proportional to 2,179.87, 3,008.13 and 1,185.13 is: 1,635.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,179.87 : 3,008.13 = 1,185.13 : x
  2. Step 2: Convert to fraction form
    2,179.87/3,008.13 = 1,185.13/x
  3. Step 3: Cross multiply
    2,179.87x = 3,008.13 × 1,185.13
  4. Step 4: Simplify right side
    2,179.87x = 3,565,025.11
  5. Step 5: Solve for x
    x = 3,565,025.11/2,179.87
  6. Step 6: Final answer
    x = 1,635.43

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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.