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Finding the Fourth Proportional to 2,179.81, 3,008.17 and 1,185.09

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Solution

The fourth proportional to 2,179.81, 3,008.17 and 1,185.09 is: 1,635.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,179.81 : 3,008.17 = 1,185.09 : x
  2. Step 2: Convert to fraction form
    2,179.81/3,008.17 = 1,185.09/x
  3. Step 3: Cross multiply
    2,179.81x = 3,008.17 × 1,185.09
  4. Step 4: Simplify right side
    2,179.81x = 3,564,942.00
  5. Step 5: Solve for x
    x = 3,564,942.00/2,179.81
  6. Step 6: Final answer
    x = 1,635.44

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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.