Home / 1,399.14-2,099.25-618.75

Finding the Fourth Proportional to 1,399.14, 2,099.25 and 618.75

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Solution

The fourth proportional to 1,399.14, 2,099.25 and 618.75 is: 928.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,399.14 : 2,099.25 = 618.75 : x
  2. Step 2: Convert to fraction form
    1,399.14/2,099.25 = 618.75/x
  3. Step 3: Cross multiply
    1,399.14x = 2,099.25 × 618.75
  4. Step 4: Simplify right side
    1,399.14x = 1,298,910.94
  5. Step 5: Solve for x
    x = 1,298,910.94/1,399.14
  6. Step 6: Final answer
    x = 928.36

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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.