Home / 1,399.36-2,099.07-425.44

Finding the Fourth Proportional to 1,399.36, 2,099.07 and 425.44

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Solution

The fourth proportional to 1,399.36, 2,099.07 and 425.44 is: 638.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,399.36 : 2,099.07 = 425.44 : x
  2. Step 2: Convert to fraction form
    1,399.36/2,099.07 = 425.44/x
  3. Step 3: Cross multiply
    1,399.36x = 2,099.07 × 425.44
  4. Step 4: Simplify right side
    1,399.36x = 893,028.34
  5. Step 5: Solve for x
    x = 893,028.34/1,399.36
  6. Step 6: Final answer
    x = 638.17

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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.