Home / 1,971.02-2,720.15-1,131.96

Finding the Fourth Proportional to 1,971.02, 2,720.15 and 1,131.96

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Solution

The fourth proportional to 1,971.02, 2,720.15 and 1,131.96 is: 1,562.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,971.02 : 2,720.15 = 1,131.96 : x
  2. Step 2: Convert to fraction form
    1,971.02/2,720.15 = 1,131.96/x
  3. Step 3: Cross multiply
    1,971.02x = 2,720.15 × 1,131.96
  4. Step 4: Simplify right side
    1,971.02x = 3,079,100.99
  5. Step 5: Solve for x
    x = 3,079,100.99/1,971.02
  6. Step 6: Final answer
    x = 1,562.19

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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.