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Finding the Fourth Proportional to 2,018.95, 3,027.66 and 786.21

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Solution

The fourth proportional to 2,018.95, 3,027.66 and 786.21 is: 1,179.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,018.95 : 3,027.66 = 786.21 : x
  2. Step 2: Convert to fraction form
    2,018.95/3,027.66 = 786.21/x
  3. Step 3: Cross multiply
    2,018.95x = 3,027.66 × 786.21
  4. Step 4: Simplify right side
    2,018.95x = 2,380,376.57
  5. Step 5: Solve for x
    x = 2,380,376.57/2,018.95
  6. Step 6: Final answer
    x = 1,179.02

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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.