Home / 1,321.38-1,982.24-396.96

Finding the Fourth Proportional to 1,321.38, 1,982.24 and 396.96

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Solution

The fourth proportional to 1,321.38, 1,982.24 and 396.96 is: 595.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,321.38 : 1,982.24 = 396.96 : x
  2. Step 2: Convert to fraction form
    1,321.38/1,982.24 = 396.96/x
  3. Step 3: Cross multiply
    1,321.38x = 1,982.24 × 396.96
  4. Step 4: Simplify right side
    1,321.38x = 786,869.99
  5. Step 5: Solve for x
    x = 786,869.99/1,321.38
  6. Step 6: Final answer
    x = 595.49

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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.