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Finding the Fourth Proportional to 3,940.04, 5,910.06 and 1,018.58

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Solution

The fourth proportional to 3,940.04, 5,910.06 and 1,018.58 is: 1,527.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,940.04 : 5,910.06 = 1,018.58 : x
  2. Step 2: Convert to fraction form
    3,940.04/5,910.06 = 1,018.58/x
  3. Step 3: Cross multiply
    3,940.04x = 5,910.06 × 1,018.58
  4. Step 4: Simplify right side
    3,940.04x = 6,019,868.91
  5. Step 5: Solve for x
    x = 6,019,868.91/3,940.04
  6. Step 6: Final answer
    x = 1,527.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.