Home / 1,780.74-2,456.97-1,109.07

Finding the Fourth Proportional to 1,780.74, 2,456.97 and 1,109.07

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Solution

The fourth proportional to 1,780.74, 2,456.97 and 1,109.07 is: 1,530.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,780.74 : 2,456.97 = 1,109.07 : x
  2. Step 2: Convert to fraction form
    1,780.74/2,456.97 = 1,109.07/x
  3. Step 3: Cross multiply
    1,780.74x = 2,456.97 × 1,109.07
  4. Step 4: Simplify right side
    1,780.74x = 2,724,939.43
  5. Step 5: Solve for x
    x = 2,724,939.43/1,780.74
  6. Step 6: Final answer
    x = 1,530.23

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.