Home / 1,917.44-2,645.70-1,131.20

Finding the Fourth Proportional to 1,917.44, 2,645.70 and 1,131.20

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Solution

The fourth proportional to 1,917.44, 2,645.70 and 1,131.20 is: 1,560.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,917.44 : 2,645.70 = 1,131.20 : x
  2. Step 2: Convert to fraction form
    1,917.44/2,645.70 = 1,131.20/x
  3. Step 3: Cross multiply
    1,917.44x = 2,645.70 × 1,131.20
  4. Step 4: Simplify right side
    1,917.44x = 2,992,815.84
  5. Step 5: Solve for x
    x = 2,992,815.84/1,917.44
  6. Step 6: Final answer
    x = 1,560.84

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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.