Home / 2,161.28-2,982.64-1,229.76

Finding the Fourth Proportional to 2,161.28, 2,982.64 and 1,229.76

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Solution

The fourth proportional to 2,161.28, 2,982.64 and 1,229.76 is: 1,697.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,161.28 : 2,982.64 = 1,229.76 : x
  2. Step 2: Convert to fraction form
    2,161.28/2,982.64 = 1,229.76/x
  3. Step 3: Cross multiply
    2,161.28x = 2,982.64 × 1,229.76
  4. Step 4: Simplify right side
    2,161.28x = 3,667,931.37
  5. Step 5: Solve for x
    x = 3,667,931.37/2,161.28
  6. Step 6: Final answer
    x = 1,697.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.