Home / 1,972.07-2,721.38-1,087.86

Finding the Fourth Proportional to 1,972.07, 2,721.38 and 1,087.86

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Solution

The fourth proportional to 1,972.07, 2,721.38 and 1,087.86 is: 1,501.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,972.07 : 2,721.38 = 1,087.86 : x
  2. Step 2: Convert to fraction form
    1,972.07/2,721.38 = 1,087.86/x
  3. Step 3: Cross multiply
    1,972.07x = 2,721.38 × 1,087.86
  4. Step 4: Simplify right side
    1,972.07x = 2,960,480.45
  5. Step 5: Solve for x
    x = 2,960,480.45/1,972.07
  6. Step 6: Final answer
    x = 1,501.20

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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.