Home / 1,972.26-2,721.53-1,215.92

Finding the Fourth Proportional to 1,972.26, 2,721.53 and 1,215.92

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Solution

The fourth proportional to 1,972.26, 2,721.53 and 1,215.92 is: 1,677.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,972.26 : 2,721.53 = 1,215.92 : x
  2. Step 2: Convert to fraction form
    1,972.26/2,721.53 = 1,215.92/x
  3. Step 3: Cross multiply
    1,972.26x = 2,721.53 × 1,215.92
  4. Step 4: Simplify right side
    1,972.26x = 3,309,143.07
  5. Step 5: Solve for x
    x = 3,309,143.07/1,972.26
  6. Step 6: Final answer
    x = 1,677.84

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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.