Home / 2,238.42-3,356.85-921.80

Finding the Fourth Proportional to 2,238.42, 3,356.85 and 921.80

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Solution

The fourth proportional to 2,238.42, 3,356.85 and 921.80 is: 1,382.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,238.42 : 3,356.85 = 921.80 : x
  2. Step 2: Convert to fraction form
    2,238.42/3,356.85 = 921.80/x
  3. Step 3: Cross multiply
    2,238.42x = 3,356.85 × 921.80
  4. Step 4: Simplify right side
    2,238.42x = 3,094,327.55
  5. Step 5: Solve for x
    x = 3,094,327.55/2,238.42
  6. Step 6: Final answer
    x = 1,382.37

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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.