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Finding the Fourth Proportional to 2,754.55, 4,131.29 and 779.70

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Solution

The fourth proportional to 2,754.55, 4,131.29 and 779.70 is: 1,169.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,754.55 : 4,131.29 = 779.70 : x
  2. Step 2: Convert to fraction form
    2,754.55/4,131.29 = 779.70/x
  3. Step 3: Cross multiply
    2,754.55x = 4,131.29 × 779.70
  4. Step 4: Simplify right side
    2,754.55x = 3,221,150.35
  5. Step 5: Solve for x
    x = 3,221,150.35/2,754.55
  6. Step 6: Final answer
    x = 1,169.39

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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.