Home / 1,245.38-1,867.93-320.95

Finding the Fourth Proportional to 1,245.38, 1,867.93 and 320.95

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Solution

The fourth proportional to 1,245.38, 1,867.93 and 320.95 is: 481.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245.38 : 1,867.93 = 320.95 : x
  2. Step 2: Convert to fraction form
    1,245.38/1,867.93 = 320.95/x
  3. Step 3: Cross multiply
    1,245.38x = 1,867.93 × 320.95
  4. Step 4: Simplify right side
    1,245.38x = 599,506.66
  5. Step 5: Solve for x
    x = 599,506.66/1,245.38
  6. Step 6: Final answer
    x = 481.38

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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.