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Finding the Fourth Proportional to 3,907.70, 5,861.57 and 1,959.47

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Solution

The fourth proportional to 3,907.70, 5,861.57 and 1,959.47 is: 2,939.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,907.70 : 5,861.57 = 1,959.47 : x
  2. Step 2: Convert to fraction form
    3,907.70/5,861.57 = 1,959.47/x
  3. Step 3: Cross multiply
    3,907.70x = 5,861.57 × 1,959.47
  4. Step 4: Simplify right side
    3,907.70x = 11,485,531.46
  5. Step 5: Solve for x
    x = 11,485,531.46/3,907.70
  6. Step 6: Final answer
    x = 2,939.21

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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.