Home / 1,971.91-2,721.36-1,087.71

Finding the Fourth Proportional to 1,971.91, 2,721.36 and 1,087.71

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Solution

The fourth proportional to 1,971.91, 2,721.36 and 1,087.71 is: 1,501.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,971.91 : 2,721.36 = 1,087.71 : x
  2. Step 2: Convert to fraction form
    1,971.91/2,721.36 = 1,087.71/x
  3. Step 3: Cross multiply
    1,971.91x = 2,721.36 × 1,087.71
  4. Step 4: Simplify right side
    1,971.91x = 2,960,050.49
  5. Step 5: Solve for x
    x = 2,960,050.49/1,971.91
  6. Step 6: Final answer
    x = 1,501.11

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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.