Home / 1,972.84-2,721.72-1,227.12

Finding the Fourth Proportional to 1,972.84, 2,721.72 and 1,227.12

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Solution

The fourth proportional to 1,972.84, 2,721.72 and 1,227.12 is: 1,692.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,972.84 : 2,721.72 = 1,227.12 : x
  2. Step 2: Convert to fraction form
    1,972.84/2,721.72 = 1,227.12/x
  3. Step 3: Cross multiply
    1,972.84x = 2,721.72 × 1,227.12
  4. Step 4: Simplify right side
    1,972.84x = 3,339,877.05
  5. Step 5: Solve for x
    x = 3,339,877.05/1,972.84
  6. Step 6: Final answer
    x = 1,692.93

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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.