Home / 1,971.28-2,720.42-1,087.17

Finding the Fourth Proportional to 1,971.28, 2,720.42 and 1,087.17

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Solution

The fourth proportional to 1,971.28, 2,720.42 and 1,087.17 is: 1,500.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,971.28 : 2,720.42 = 1,087.17 : x
  2. Step 2: Convert to fraction form
    1,971.28/2,720.42 = 1,087.17/x
  3. Step 3: Cross multiply
    1,971.28x = 2,720.42 × 1,087.17
  4. Step 4: Simplify right side
    1,971.28x = 2,957,559.01
  5. Step 5: Solve for x
    x = 2,957,559.01/1,971.28
  6. Step 6: Final answer
    x = 1,500.32

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1.5x scale

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.