Home / 2,101.28-3,149.15-867.24

Finding the Fourth Proportional to 2,101.28, 3,149.15 and 867.24

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Solution

The fourth proportional to 2,101.28, 3,149.15 and 867.24 is: 1,299.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,101.28 : 3,149.15 = 867.24 : x
  2. Step 2: Convert to fraction form
    2,101.28/3,149.15 = 867.24/x
  3. Step 3: Cross multiply
    2,101.28x = 3,149.15 × 867.24
  4. Step 4: Simplify right side
    2,101.28x = 2,731,064.51
  5. Step 5: Solve for x
    x = 2,731,064.51/2,101.28
  6. Step 6: Final answer
    x = 1,299.72

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Double scale
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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.