Home / 1,441.92-2,161.05-921.72

Finding the Fourth Proportional to 1,441.92, 2,161.05 and 921.72

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Solution

The fourth proportional to 1,441.92, 2,161.05 and 921.72 is: 1,381.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,441.92 : 2,161.05 = 921.72 : x
  2. Step 2: Convert to fraction form
    1,441.92/2,161.05 = 921.72/x
  3. Step 3: Cross multiply
    1,441.92x = 2,161.05 × 921.72
  4. Step 4: Simplify right side
    1,441.92x = 1,991,883.01
  5. Step 5: Solve for x
    x = 1,991,883.01/1,441.92
  6. Step 6: Final answer
    x = 1,381.41

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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.