Home / 1,971.31-2,720.36-1,087.11

Finding the Fourth Proportional to 1,971.31, 2,720.36 and 1,087.11

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Solution

The fourth proportional to 1,971.31, 2,720.36 and 1,087.11 is: 1,500.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,971.31 : 2,720.36 = 1,087.11 : x
  2. Step 2: Convert to fraction form
    1,971.31/2,720.36 = 1,087.11/x
  3. Step 3: Cross multiply
    1,971.31x = 2,720.36 × 1,087.11
  4. Step 4: Simplify right side
    1,971.31x = 2,957,325.12
  5. Step 5: Solve for x
    x = 2,957,325.12/1,971.31
  6. Step 6: Final answer
    x = 1,500.19

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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.