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Finding the Fourth Proportional to 3,959.66, 5,939.70 and 3,378.72

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Solution

The fourth proportional to 3,959.66, 5,939.70 and 3,378.72 is: 5,068.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,959.66 : 5,939.70 = 3,378.72 : x
  2. Step 2: Convert to fraction form
    3,959.66/5,939.70 = 3,378.72/x
  3. Step 3: Cross multiply
    3,959.66x = 5,939.70 × 3,378.72
  4. Step 4: Simplify right side
    3,959.66x = 20,068,583.18
  5. Step 5: Solve for x
    x = 20,068,583.18/3,959.66
  6. Step 6: Final answer
    x = 5,068.26

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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.