Home / 2,153.68-3,229.66-921.64

Finding the Fourth Proportional to 2,153.68, 3,229.66 and 921.64

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Solution

The fourth proportional to 2,153.68, 3,229.66 and 921.64 is: 1,382.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,153.68 : 3,229.66 = 921.64 : x
  2. Step 2: Convert to fraction form
    2,153.68/3,229.66 = 921.64/x
  3. Step 3: Cross multiply
    2,153.68x = 3,229.66 × 921.64
  4. Step 4: Simplify right side
    2,153.68x = 2,976,583.84
  5. Step 5: Solve for x
    x = 2,976,583.84/2,153.68
  6. Step 6: Final answer
    x = 1,382.09

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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.