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Finding the Fourth Proportional to 2,724.54, 4,086.09 and 776.85

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Solution

The fourth proportional to 2,724.54, 4,086.09 and 776.85 is: 1,165.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,724.54 : 4,086.09 = 776.85 : x
  2. Step 2: Convert to fraction form
    2,724.54/4,086.09 = 776.85/x
  3. Step 3: Cross multiply
    2,724.54x = 4,086.09 × 776.85
  4. Step 4: Simplify right side
    2,724.54x = 3,174,279.02
  5. Step 5: Solve for x
    x = 3,174,279.02/2,724.54
  6. Step 6: Final answer
    x = 1,165.07

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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.