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Finding the Fourth Proportional to 2,738.42, 4,107.72 and 790.64

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Solution

The fourth proportional to 2,738.42, 4,107.72 and 790.64 is: 1,185.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,738.42 : 4,107.72 = 790.64 : x
  2. Step 2: Convert to fraction form
    2,738.42/4,107.72 = 790.64/x
  3. Step 3: Cross multiply
    2,738.42x = 4,107.72 × 790.64
  4. Step 4: Simplify right side
    2,738.42x = 3,247,727.74
  5. Step 5: Solve for x
    x = 3,247,727.74/2,738.42
  6. Step 6: Final answer
    x = 1,185.99

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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.