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Finding the Fourth Proportional to 2,687.19, 4,030.92 and 739.54

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Solution

The fourth proportional to 2,687.19, 4,030.92 and 739.54 is: 1,109.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,687.19 : 4,030.92 = 739.54 : x
  2. Step 2: Convert to fraction form
    2,687.19/4,030.92 = 739.54/x
  3. Step 3: Cross multiply
    2,687.19x = 4,030.92 × 739.54
  4. Step 4: Simplify right side
    2,687.19x = 2,981,026.58
  5. Step 5: Solve for x
    x = 2,981,026.58/2,687.19
  6. Step 6: Final answer
    x = 1,109.35

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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.