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Finding the Fourth Proportional to 2,187.44, 3,018 and 1,243.16

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Solution

The fourth proportional to 2,187.44, 3,018 and 1,243.16 is: 1,715.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,187.44 : 3,018 = 1,243.16 : x
  2. Step 2: Convert to fraction form
    2,187.44/3,018 = 1,243.16/x
  3. Step 3: Cross multiply
    2,187.44x = 3,018 × 1,243.16
  4. Step 4: Simplify right side
    2,187.44x = 3,751,856.88
  5. Step 5: Solve for x
    x = 3,751,856.88/2,187.44
  6. Step 6: Final answer
    x = 1,715.18

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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.