Home / 3,880.80-5,820.32-1,107.42

Finding the Fourth Proportional to 3,880.80, 5,820.32 and 1,107.42

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Solution

The fourth proportional to 3,880.80, 5,820.32 and 1,107.42 is: 1,660.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,880.80 : 5,820.32 = 1,107.42 : x
  2. Step 2: Convert to fraction form
    3,880.80/5,820.32 = 1,107.42/x
  3. Step 3: Cross multiply
    3,880.80x = 5,820.32 × 1,107.42
  4. Step 4: Simplify right side
    3,880.80x = 6,445,538.77
  5. Step 5: Solve for x
    x = 6,445,538.77/3,880.80
  6. Step 6: Final answer
    x = 1,660.88

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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.