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Finding the Fourth Proportional to 1,208.86, 1,813.56 and 343.24

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Solution

The fourth proportional to 1,208.86, 1,813.56 and 343.24 is: 514.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,208.86 : 1,813.56 = 343.24 : x
  2. Step 2: Convert to fraction form
    1,208.86/1,813.56 = 343.24/x
  3. Step 3: Cross multiply
    1,208.86x = 1,813.56 × 343.24
  4. Step 4: Simplify right side
    1,208.86x = 622,486.33
  5. Step 5: Solve for x
    x = 622,486.33/1,208.86
  6. Step 6: Final answer
    x = 514.94

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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.