Home / 1,971.18-2,720.31-1,131.87

Finding the Fourth Proportional to 1,971.18, 2,720.31 and 1,131.87

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Solution

The fourth proportional to 1,971.18, 2,720.31 and 1,131.87 is: 1,562.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,971.18 : 2,720.31 = 1,131.87 : x
  2. Step 2: Convert to fraction form
    1,971.18/2,720.31 = 1,131.87/x
  3. Step 3: Cross multiply
    1,971.18x = 2,720.31 × 1,131.87
  4. Step 4: Simplify right side
    1,971.18x = 3,079,037.28
  5. Step 5: Solve for x
    x = 3,079,037.28/1,971.18
  6. Step 6: Final answer
    x = 1,562.03

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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.