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Finding the Fourth Proportional to 2,747.14, 4,120.74 and 772.79

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Solution

The fourth proportional to 2,747.14, 4,120.74 and 772.79 is: 1,159.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,747.14 : 4,120.74 = 772.79 : x
  2. Step 2: Convert to fraction form
    2,747.14/4,120.74 = 772.79/x
  3. Step 3: Cross multiply
    2,747.14x = 4,120.74 × 772.79
  4. Step 4: Simplify right side
    2,747.14x = 3,184,446.06
  5. Step 5: Solve for x
    x = 3,184,446.06/2,747.14
  6. Step 6: Final answer
    x = 1,159.19

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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.