Home / 3,721.21-5,579.79-1,123.81

Finding the Fourth Proportional to 3,721.21, 5,579.79 and 1,123.81

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Solution

The fourth proportional to 3,721.21, 5,579.79 and 1,123.81 is: 1,685.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,721.21 : 5,579.79 = 1,123.81 : x
  2. Step 2: Convert to fraction form
    3,721.21/5,579.79 = 1,123.81/x
  3. Step 3: Cross multiply
    3,721.21x = 5,579.79 × 1,123.81
  4. Step 4: Simplify right side
    3,721.21x = 6,270,623.80
  5. Step 5: Solve for x
    x = 6,270,623.80/3,721.21
  6. Step 6: Final answer
    x = 1,685.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.