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Finding the Fourth Proportional to 3,955.32, 5,931.30 and 1,286.22

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Solution

The fourth proportional to 3,955.32, 5,931.30 and 1,286.22 is: 1,928.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,955.32 : 5,931.30 = 1,286.22 : x
  2. Step 2: Convert to fraction form
    3,955.32/5,931.30 = 1,286.22/x
  3. Step 3: Cross multiply
    3,955.32x = 5,931.30 × 1,286.22
  4. Step 4: Simplify right side
    3,955.32x = 7,628,956.69
  5. Step 5: Solve for x
    x = 7,628,956.69/3,955.32
  6. Step 6: Final answer
    x = 1,928.78

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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.