Home / 2,660.40-3,989.82-1,272.96

Finding the Fourth Proportional to 2,660.40, 3,989.82 and 1,272.96

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Solution

The fourth proportional to 2,660.40, 3,989.82 and 1,272.96 is: 1,909.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,660.40 : 3,989.82 = 1,272.96 : x
  2. Step 2: Convert to fraction form
    2,660.40/3,989.82 = 1,272.96/x
  3. Step 3: Cross multiply
    2,660.40x = 3,989.82 × 1,272.96
  4. Step 4: Simplify right side
    2,660.40x = 5,078,881.27
  5. Step 5: Solve for x
    x = 5,078,881.27/2,660.40
  6. Step 6: Final answer
    x = 1,909.07

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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.