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Finding the Fourth Proportional to 2,237.78, 3,356.71 and 677.80

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Solution

The fourth proportional to 2,237.78, 3,356.71 and 677.80 is: 1,016.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,237.78 : 3,356.71 = 677.80 : x
  2. Step 2: Convert to fraction form
    2,237.78/3,356.71 = 677.80/x
  3. Step 3: Cross multiply
    2,237.78x = 3,356.71 × 677.80
  4. Step 4: Simplify right side
    2,237.78x = 2,275,178.04
  5. Step 5: Solve for x
    x = 2,275,178.04/2,237.78
  6. Step 6: Final answer
    x = 1,016.71

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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.