Home / 1,971.91-2,721.25-1,087.74

Finding the Fourth Proportional to 1,971.91, 2,721.25 and 1,087.74

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Solution

The fourth proportional to 1,971.91, 2,721.25 and 1,087.74 is: 1,501.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,971.91 : 2,721.25 = 1,087.74 : x
  2. Step 2: Convert to fraction form
    1,971.91/2,721.25 = 1,087.74/x
  3. Step 3: Cross multiply
    1,971.91x = 2,721.25 × 1,087.74
  4. Step 4: Simplify right side
    1,971.91x = 2,960,012.48
  5. Step 5: Solve for x
    x = 2,960,012.48/1,971.91
  6. Step 6: Final answer
    x = 1,501.09

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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.