Home / 2,187.78-3,018.67-1,243.35

Finding the Fourth Proportional to 2,187.78, 3,018.67 and 1,243.35

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Solution

The fourth proportional to 2,187.78, 3,018.67 and 1,243.35 is: 1,715.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,187.78 : 3,018.67 = 1,243.35 : x
  2. Step 2: Convert to fraction form
    2,187.78/3,018.67 = 1,243.35/x
  3. Step 3: Cross multiply
    2,187.78x = 3,018.67 × 1,243.35
  4. Step 4: Simplify right side
    2,187.78x = 3,753,260.24
  5. Step 5: Solve for x
    x = 3,753,260.24/2,187.78
  6. Step 6: Final answer
    x = 1,715.56

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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.