Home / 2,721.30-4,082.22-989.52

Finding the Fourth Proportional to 2,721.30, 4,082.22 and 989.52

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Solution

The fourth proportional to 2,721.30, 4,082.22 and 989.52 is: 1,484.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,721.30 : 4,082.22 = 989.52 : x
  2. Step 2: Convert to fraction form
    2,721.30/4,082.22 = 989.52/x
  3. Step 3: Cross multiply
    2,721.30x = 4,082.22 × 989.52
  4. Step 4: Simplify right side
    2,721.30x = 4,039,438.33
  5. Step 5: Solve for x
    x = 4,039,438.33/2,721.30
  6. Step 6: Final answer
    x = 1,484.38

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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.