Home / 1,939.53-2,909.49-1,118.73

Finding the Fourth Proportional to 1,939.53, 2,909.49 and 1,118.73

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Solution

The fourth proportional to 1,939.53, 2,909.49 and 1,118.73 is: 1,678.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,939.53 : 2,909.49 = 1,118.73 : x
  2. Step 2: Convert to fraction form
    1,939.53/2,909.49 = 1,118.73/x
  3. Step 3: Cross multiply
    1,939.53x = 2,909.49 × 1,118.73
  4. Step 4: Simplify right side
    1,939.53x = 3,254,933.75
  5. Step 5: Solve for x
    x = 3,254,933.75/1,939.53
  6. Step 6: Final answer
    x = 1,678.21

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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.