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Finding the Fourth Proportional to 2,687.26, 4,030.78 and 739.41

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Solution

The fourth proportional to 2,687.26, 4,030.78 and 739.41 is: 1,109.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,687.26 : 4,030.78 = 739.41 : x
  2. Step 2: Convert to fraction form
    2,687.26/4,030.78 = 739.41/x
  3. Step 3: Cross multiply
    2,687.26x = 4,030.78 × 739.41
  4. Step 4: Simplify right side
    2,687.26x = 2,980,399.04
  5. Step 5: Solve for x
    x = 2,980,399.04/2,687.26
  6. Step 6: Final answer
    x = 1,109.08

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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.