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Finding the Fourth Proportional to 3,960.32, 5,939.28 and 1,327.15

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Solution

The fourth proportional to 3,960.32, 5,939.28 and 1,327.15 is: 1,990.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,960.32 : 5,939.28 = 1,327.15 : x
  2. Step 2: Convert to fraction form
    3,960.32/5,939.28 = 1,327.15/x
  3. Step 3: Cross multiply
    3,960.32x = 5,939.28 × 1,327.15
  4. Step 4: Simplify right side
    3,960.32x = 7,882,315.45
  5. Step 5: Solve for x
    x = 7,882,315.45/3,960.32
  6. Step 6: Final answer
    x = 1,990.32

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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.