Home / 1,619.78-2,428.14-1,327.91

Finding the Fourth Proportional to 1,619.78, 2,428.14 and 1,327.91

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Solution

The fourth proportional to 1,619.78, 2,428.14 and 1,327.91 is: 1,990.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,619.78 : 2,428.14 = 1,327.91 : x
  2. Step 2: Convert to fraction form
    1,619.78/2,428.14 = 1,327.91/x
  3. Step 3: Cross multiply
    1,619.78x = 2,428.14 × 1,327.91
  4. Step 4: Simplify right side
    1,619.78x = 3,224,351.39
  5. Step 5: Solve for x
    x = 3,224,351.39/1,619.78
  6. Step 6: Final answer
    x = 1,990.61

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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.