Home / 2,660.30-3,988.72-1,273.60

Finding the Fourth Proportional to 2,660.30, 3,988.72 and 1,273.60

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Solution

The fourth proportional to 2,660.30, 3,988.72 and 1,273.60 is: 1,909.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,660.30 : 3,988.72 = 1,273.60 : x
  2. Step 2: Convert to fraction form
    2,660.30/3,988.72 = 1,273.60/x
  3. Step 3: Cross multiply
    2,660.30x = 3,988.72 × 1,273.60
  4. Step 4: Simplify right side
    2,660.30x = 5,080,033.79
  5. Step 5: Solve for x
    x = 5,080,033.79/2,660.30
  6. Step 6: Final answer
    x = 1,909.57

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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.