Home / 1,245.26-1,867.98-423.20

Finding the Fourth Proportional to 1,245.26, 1,867.98 and 423.20

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Solution

The fourth proportional to 1,245.26, 1,867.98 and 423.20 is: 634.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245.26 : 1,867.98 = 423.20 : x
  2. Step 2: Convert to fraction form
    1,245.26/1,867.98 = 423.20/x
  3. Step 3: Cross multiply
    1,245.26x = 1,867.98 × 423.20
  4. Step 4: Simplify right side
    1,245.26x = 790,529.14
  5. Step 5: Solve for x
    x = 790,529.14/1,245.26
  6. Step 6: Final answer
    x = 634.83

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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.