Home / 1,245.08-1,867.11-423.42

Finding the Fourth Proportional to 1,245.08, 1,867.11 and 423.42

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Solution

The fourth proportional to 1,245.08, 1,867.11 and 423.42 is: 634.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245.08 : 1,867.11 = 423.42 : x
  2. Step 2: Convert to fraction form
    1,245.08/1,867.11 = 423.42/x
  3. Step 3: Cross multiply
    1,245.08x = 1,867.11 × 423.42
  4. Step 4: Simplify right side
    1,245.08x = 790,571.72
  5. Step 5: Solve for x
    x = 790,571.72/1,245.08
  6. Step 6: Final answer
    x = 634.96

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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.