Home / 3,161.91-4,742.98-1,187.36

Finding the Fourth Proportional to 3,161.91, 4,742.98 and 1,187.36

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Solution

The fourth proportional to 3,161.91, 4,742.98 and 1,187.36 is: 1,781.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,161.91 : 4,742.98 = 1,187.36 : x
  2. Step 2: Convert to fraction form
    3,161.91/4,742.98 = 1,187.36/x
  3. Step 3: Cross multiply
    3,161.91x = 4,742.98 × 1,187.36
  4. Step 4: Simplify right side
    3,161.91x = 5,631,619.18
  5. Step 5: Solve for x
    x = 5,631,619.18/3,161.91
  6. Step 6: Final answer
    x = 1,781.08

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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.