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Finding the Fourth Proportional to 3,939.84, 5,907.33 and 1,342.17

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Solution

The fourth proportional to 3,939.84, 5,907.33 and 1,342.17 is: 2,012.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,939.84 : 5,907.33 = 1,342.17 : x
  2. Step 2: Convert to fraction form
    3,939.84/5,907.33 = 1,342.17/x
  3. Step 3: Cross multiply
    3,939.84x = 5,907.33 × 1,342.17
  4. Step 4: Simplify right side
    3,939.84x = 7,928,641.11
  5. Step 5: Solve for x
    x = 7,928,641.11/3,939.84
  6. Step 6: Final answer
    x = 2,012.43

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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.