Home / 2,660.13-3,990.06-1,274.40

Finding the Fourth Proportional to 2,660.13, 3,990.06 and 1,274.40

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Solution

The fourth proportional to 2,660.13, 3,990.06 and 1,274.40 is: 1,911.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,660.13 : 3,990.06 = 1,274.40 : x
  2. Step 2: Convert to fraction form
    2,660.13/3,990.06 = 1,274.40/x
  3. Step 3: Cross multiply
    2,660.13x = 3,990.06 × 1,274.40
  4. Step 4: Simplify right side
    2,660.13x = 5,084,932.46
  5. Step 5: Solve for x
    x = 5,084,932.46/2,660.13
  6. Step 6: Final answer
    x = 1,911.54

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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.