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Finding the Fourth Proportional to 2,723.80, 4,086.40 and 776.04

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Solution

The fourth proportional to 2,723.80, 4,086.40 and 776.04 is: 1,164.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,723.80 : 4,086.40 = 776.04 : x
  2. Step 2: Convert to fraction form
    2,723.80/4,086.40 = 776.04/x
  3. Step 3: Cross multiply
    2,723.80x = 4,086.40 × 776.04
  4. Step 4: Simplify right side
    2,723.80x = 3,171,209.86
  5. Step 5: Solve for x
    x = 3,171,209.86/2,723.80
  6. Step 6: Final answer
    x = 1,164.26

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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.