Home / 1,971.92-2,721.41-1,087.90

Finding the Fourth Proportional to 1,971.92, 2,721.41 and 1,087.90

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Solution

The fourth proportional to 1,971.92, 2,721.41 and 1,087.90 is: 1,501.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,971.92 : 2,721.41 = 1,087.90 : x
  2. Step 2: Convert to fraction form
    1,971.92/2,721.41 = 1,087.90/x
  3. Step 3: Cross multiply
    1,971.92x = 2,721.41 × 1,087.90
  4. Step 4: Simplify right side
    1,971.92x = 2,960,621.94
  5. Step 5: Solve for x
    x = 2,960,621.94/1,971.92
  6. Step 6: Final answer
    x = 1,501.39

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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.