Home / 1,245.31-1,867.97-423.58

Finding the Fourth Proportional to 1,245.31, 1,867.97 and 423.58

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Solution

The fourth proportional to 1,245.31, 1,867.97 and 423.58 is: 635.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245.31 : 1,867.97 = 423.58 : x
  2. Step 2: Convert to fraction form
    1,245.31/1,867.97 = 423.58/x
  3. Step 3: Cross multiply
    1,245.31x = 1,867.97 × 423.58
  4. Step 4: Simplify right side
    1,245.31x = 791,234.73
  5. Step 5: Solve for x
    x = 791,234.73/1,245.31
  6. Step 6: Final answer
    x = 635.37

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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.