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Finding the Fourth Proportional to 3,115.56, 4,671.81 and 1,947.09

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Solution

The fourth proportional to 3,115.56, 4,671.81 and 1,947.09 is: 2,919.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,115.56 : 4,671.81 = 1,947.09 : x
  2. Step 2: Convert to fraction form
    3,115.56/4,671.81 = 1,947.09/x
  3. Step 3: Cross multiply
    3,115.56x = 4,671.81 × 1,947.09
  4. Step 4: Simplify right side
    3,115.56x = 9,096,434.53
  5. Step 5: Solve for x
    x = 9,096,434.53/3,115.56
  6. Step 6: Final answer
    x = 2,919.68

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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.