Home / 1,721.62-2,372.44-1,223.40

Finding the Fourth Proportional to 1,721.62, 2,372.44 and 1,223.40

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Solution

The fourth proportional to 1,721.62, 2,372.44 and 1,223.40 is: 1,685.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,721.62 : 2,372.44 = 1,223.40 : x
  2. Step 2: Convert to fraction form
    1,721.62/2,372.44 = 1,223.40/x
  3. Step 3: Cross multiply
    1,721.62x = 2,372.44 × 1,223.40
  4. Step 4: Simplify right side
    1,721.62x = 2,902,451.23
  5. Step 5: Solve for x
    x = 2,902,451.23/1,721.62
  6. Step 6: Final answer
    x = 1,685.88

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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.