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Finding the Fourth Proportional to 2,679.93, 4,012.65 and 1,940.31

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Solution

The fourth proportional to 2,679.93, 4,012.65 and 1,940.31 is: 2,905.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,679.93 : 4,012.65 = 1,940.31 : x
  2. Step 2: Convert to fraction form
    2,679.93/4,012.65 = 1,940.31/x
  3. Step 3: Cross multiply
    2,679.93x = 4,012.65 × 1,940.31
  4. Step 4: Simplify right side
    2,679.93x = 7,785,784.92
  5. Step 5: Solve for x
    x = 7,785,784.92/2,679.93
  6. Step 6: Final answer
    x = 2,905.22

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1.5x scale

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.