Home / 1,972.54-2,721.13-1,290.77

Finding the Fourth Proportional to 1,972.54, 2,721.13 and 1,290.77

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Solution

The fourth proportional to 1,972.54, 2,721.13 and 1,290.77 is: 1,780.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,972.54 : 2,721.13 = 1,290.77 : x
  2. Step 2: Convert to fraction form
    1,972.54/2,721.13 = 1,290.77/x
  3. Step 3: Cross multiply
    1,972.54x = 2,721.13 × 1,290.77
  4. Step 4: Simplify right side
    1,972.54x = 3,512,352.97
  5. Step 5: Solve for x
    x = 3,512,352.97/1,972.54
  6. Step 6: Final answer
    x = 1,780.62

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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.