Home / 2,639.70-3,957.68-1,322.51

Finding the Fourth Proportional to 2,639.70, 3,957.68 and 1,322.51

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Solution

The fourth proportional to 2,639.70, 3,957.68 and 1,322.51 is: 1,982.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,639.70 : 3,957.68 = 1,322.51 : x
  2. Step 2: Convert to fraction form
    2,639.70/3,957.68 = 1,322.51/x
  3. Step 3: Cross multiply
    2,639.70x = 3,957.68 × 1,322.51
  4. Step 4: Simplify right side
    2,639.70x = 5,234,064.76
  5. Step 5: Solve for x
    x = 5,234,064.76/2,639.70
  6. Step 6: Final answer
    x = 1,982.83

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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.