Home / 1,245.12-1,867.66-423.38

Finding the Fourth Proportional to 1,245.12, 1,867.66 and 423.38

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Solution

The fourth proportional to 1,245.12, 1,867.66 and 423.38 is: 635.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245.12 : 1,867.66 = 423.38 : x
  2. Step 2: Convert to fraction form
    1,245.12/1,867.66 = 423.38/x
  3. Step 3: Cross multiply
    1,245.12x = 1,867.66 × 423.38
  4. Step 4: Simplify right side
    1,245.12x = 790,729.89
  5. Step 5: Solve for x
    x = 790,729.89/1,245.12
  6. Step 6: Final answer
    x = 635.06

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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.