Home / 1,791.20-2,471.88-1,005.22

Finding the Fourth Proportional to 1,791.20, 2,471.88 and 1,005.22

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Solution

The fourth proportional to 1,791.20, 2,471.88 and 1,005.22 is: 1,387.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,791.20 : 2,471.88 = 1,005.22 : x
  2. Step 2: Convert to fraction form
    1,791.20/2,471.88 = 1,005.22/x
  3. Step 3: Cross multiply
    1,791.20x = 2,471.88 × 1,005.22
  4. Step 4: Simplify right side
    1,791.20x = 2,484,783.21
  5. Step 5: Solve for x
    x = 2,484,783.21/1,791.20
  6. Step 6: Final answer
    x = 1,387.22

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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.