Home / 2,660.45-3,987.95-1,200.62

Finding the Fourth Proportional to 2,660.45, 3,987.95 and 1,200.62

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Solution

The fourth proportional to 2,660.45, 3,987.95 and 1,200.62 is: 1,799.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,660.45 : 3,987.95 = 1,200.62 : x
  2. Step 2: Convert to fraction form
    2,660.45/3,987.95 = 1,200.62/x
  3. Step 3: Cross multiply
    2,660.45x = 3,987.95 × 1,200.62
  4. Step 4: Simplify right side
    2,660.45x = 4,788,016.50
  5. Step 5: Solve for x
    x = 4,788,016.50/2,660.45
  6. Step 6: Final answer
    x = 1,799.71

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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.