Home / 1,425.44-2,138.32-399.52

Finding the Fourth Proportional to 1,425.44, 2,138.32 and 399.52

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Solution

The fourth proportional to 1,425.44, 2,138.32 and 399.52 is: 599.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,425.44 : 2,138.32 = 399.52 : x
  2. Step 2: Convert to fraction form
    1,425.44/2,138.32 = 399.52/x
  3. Step 3: Cross multiply
    1,425.44x = 2,138.32 × 399.52
  4. Step 4: Simplify right side
    1,425.44x = 854,301.61
  5. Step 5: Solve for x
    x = 854,301.61/1,425.44
  6. Step 6: Final answer
    x = 599.32

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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.