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Finding the Fourth Proportional to 2,674.74, 4,012.86 and 919.97

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Solution

The fourth proportional to 2,674.74, 4,012.86 and 919.97 is: 1,380.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,674.74 : 4,012.86 = 919.97 : x
  2. Step 2: Convert to fraction form
    2,674.74/4,012.86 = 919.97/x
  3. Step 3: Cross multiply
    2,674.74x = 4,012.86 × 919.97
  4. Step 4: Simplify right side
    2,674.74x = 3,691,710.81
  5. Step 5: Solve for x
    x = 3,691,710.81/2,674.74
  6. Step 6: Final answer
    x = 1,380.21

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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.