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Finding the Fourth Proportional to 2,947.56, 4,422 and 867.54

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Solution

The fourth proportional to 2,947.56, 4,422 and 867.54 is: 1,301.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,947.56 : 4,422 = 867.54 : x
  2. Step 2: Convert to fraction form
    2,947.56/4,422 = 867.54/x
  3. Step 3: Cross multiply
    2,947.56x = 4,422 × 867.54
  4. Step 4: Simplify right side
    2,947.56x = 3,836,261.88
  5. Step 5: Solve for x
    x = 3,836,261.88/2,947.56
  6. Step 6: Final answer
    x = 1,301.50

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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.