Home / 1,939.14-2,908.67-478.29

Finding the Fourth Proportional to 1,939.14, 2,908.67 and 478.29

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Solution

The fourth proportional to 1,939.14, 2,908.67 and 478.29 is: 717.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,939.14 : 2,908.67 = 478.29 : x
  2. Step 2: Convert to fraction form
    1,939.14/2,908.67 = 478.29/x
  3. Step 3: Cross multiply
    1,939.14x = 2,908.67 × 478.29
  4. Step 4: Simplify right side
    1,939.14x = 1,391,185.38
  5. Step 5: Solve for x
    x = 1,391,185.38/1,939.14
  6. Step 6: Final answer
    x = 717.42

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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.