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Finding the Fourth Proportional to 1,273.68, 1,910.43 and 349.16

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Solution

The fourth proportional to 1,273.68, 1,910.43 and 349.16 is: 523.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,273.68 : 1,910.43 = 349.16 : x
  2. Step 2: Convert to fraction form
    1,273.68/1,910.43 = 349.16/x
  3. Step 3: Cross multiply
    1,273.68x = 1,910.43 × 349.16
  4. Step 4: Simplify right side
    1,273.68x = 667,036.19
  5. Step 5: Solve for x
    x = 667,036.19/1,273.68
  6. Step 6: Final answer
    x = 523.71

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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.