Home / 1,971.05-2,719.77-1,131.79

Finding the Fourth Proportional to 1,971.05, 2,719.77 and 1,131.79

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Solution

The fourth proportional to 1,971.05, 2,719.77 and 1,131.79 is: 1,561.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,971.05 : 2,719.77 = 1,131.79 : x
  2. Step 2: Convert to fraction form
    1,971.05/2,719.77 = 1,131.79/x
  3. Step 3: Cross multiply
    1,971.05x = 2,719.77 × 1,131.79
  4. Step 4: Simplify right side
    1,971.05x = 3,078,208.49
  5. Step 5: Solve for x
    x = 3,078,208.49/1,971.05
  6. Step 6: Final answer
    x = 1,561.71

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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.