Home / 1,971.24-2,720.30-1,087.05

Finding the Fourth Proportional to 1,971.24, 2,720.30 and 1,087.05

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Solution

The fourth proportional to 1,971.24, 2,720.30 and 1,087.05 is: 1,500.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,971.24 : 2,720.30 = 1,087.05 : x
  2. Step 2: Convert to fraction form
    1,971.24/2,720.30 = 1,087.05/x
  3. Step 3: Cross multiply
    1,971.24x = 2,720.30 × 1,087.05
  4. Step 4: Simplify right side
    1,971.24x = 2,957,091.23
  5. Step 5: Solve for x
    x = 2,957,091.23/1,971.24
  6. Step 6: Final answer
    x = 1,500.12

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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.