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Finding the Fourth Proportional to 2,791.38, 4,187.06 and 739.38

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Solution

The fourth proportional to 2,791.38, 4,187.06 and 739.38 is: 1,109.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,791.38 : 4,187.06 = 739.38 : x
  2. Step 2: Convert to fraction form
    2,791.38/4,187.06 = 739.38/x
  3. Step 3: Cross multiply
    2,791.38x = 4,187.06 × 739.38
  4. Step 4: Simplify right side
    2,791.38x = 3,095,828.42
  5. Step 5: Solve for x
    x = 3,095,828.42/2,791.38
  6. Step 6: Final answer
    x = 1,109.07

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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.