Home / 1,399.24-2,099.13-425.49

Finding the Fourth Proportional to 1,399.24, 2,099.13 and 425.49

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Solution

The fourth proportional to 1,399.24, 2,099.13 and 425.49 is: 638.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,399.24 : 2,099.13 = 425.49 : x
  2. Step 2: Convert to fraction form
    1,399.24/2,099.13 = 425.49/x
  3. Step 3: Cross multiply
    1,399.24x = 2,099.13 × 425.49
  4. Step 4: Simplify right side
    1,399.24x = 893,158.82
  5. Step 5: Solve for x
    x = 893,158.82/1,399.24
  6. Step 6: Final answer
    x = 638.32

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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.