Home / 3,921.40-5,880.21-2,278.42

Finding the Fourth Proportional to 3,921.40, 5,880.21 and 2,278.42

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Solution

The fourth proportional to 3,921.40, 5,880.21 and 2,278.42 is: 3,416.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,921.40 : 5,880.21 = 2,278.42 : x
  2. Step 2: Convert to fraction form
    3,921.40/5,880.21 = 2,278.42/x
  3. Step 3: Cross multiply
    3,921.40x = 5,880.21 × 2,278.42
  4. Step 4: Simplify right side
    3,921.40x = 13,397,588.07
  5. Step 5: Solve for x
    x = 13,397,588.07/3,921.40
  6. Step 6: Final answer
    x = 3,416.53

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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.