Home / 3,860.10-5,790.42-1,087.20

Finding the Fourth Proportional to 3,860.10, 5,790.42 and 1,087.20

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Solution

The fourth proportional to 3,860.10, 5,790.42 and 1,087.20 is: 1,630.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,860.10 : 5,790.42 = 1,087.20 : x
  2. Step 2: Convert to fraction form
    3,860.10/5,790.42 = 1,087.20/x
  3. Step 3: Cross multiply
    3,860.10x = 5,790.42 × 1,087.20
  4. Step 4: Simplify right side
    3,860.10x = 6,295,344.62
  5. Step 5: Solve for x
    x = 6,295,344.62/3,860.10
  6. Step 6: Final answer
    x = 1,630.88

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1.5x scale

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.