Home / 2,947.25-4,421.06-867.21

Finding the Fourth Proportional to 2,947.25, 4,421.06 and 867.21

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Solution

The fourth proportional to 2,947.25, 4,421.06 and 867.21 is: 1,300.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,947.25 : 4,421.06 = 867.21 : x
  2. Step 2: Convert to fraction form
    2,947.25/4,421.06 = 867.21/x
  3. Step 3: Cross multiply
    2,947.25x = 4,421.06 × 867.21
  4. Step 4: Simplify right side
    2,947.25x = 3,833,983.11
  5. Step 5: Solve for x
    x = 3,833,983.11/2,947.25
  6. Step 6: Final answer
    x = 1,300.87

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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.