Home / 1,245.19-1,867.44-423.31

Finding the Fourth Proportional to 1,245.19, 1,867.44 and 423.31

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Solution

The fourth proportional to 1,245.19, 1,867.44 and 423.31 is: 634.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245.19 : 1,867.44 = 423.31 : x
  2. Step 2: Convert to fraction form
    1,245.19/1,867.44 = 423.31/x
  3. Step 3: Cross multiply
    1,245.19x = 1,867.44 × 423.31
  4. Step 4: Simplify right side
    1,245.19x = 790,506.03
  5. Step 5: Solve for x
    x = 790,506.03/1,245.19
  6. Step 6: Final answer
    x = 634.85

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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.