Home / 1,425.50-2,138.33-399.58

Finding the Fourth Proportional to 1,425.50, 2,138.33 and 399.58

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Solution

The fourth proportional to 1,425.50, 2,138.33 and 399.58 is: 599.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,425.50 : 2,138.33 = 399.58 : x
  2. Step 2: Convert to fraction form
    1,425.50/2,138.33 = 399.58/x
  3. Step 3: Cross multiply
    1,425.50x = 2,138.33 × 399.58
  4. Step 4: Simplify right side
    1,425.50x = 854,433.90
  5. Step 5: Solve for x
    x = 854,433.90/1,425.50
  6. Step 6: Final answer
    x = 599.39

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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.