Home / 2,660.34-3,990.57-928.97

Finding the Fourth Proportional to 2,660.34, 3,990.57 and 928.97

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Solution

The fourth proportional to 2,660.34, 3,990.57 and 928.97 is: 1,393.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,660.34 : 3,990.57 = 928.97 : x
  2. Step 2: Convert to fraction form
    2,660.34/3,990.57 = 928.97/x
  3. Step 3: Cross multiply
    2,660.34x = 3,990.57 × 928.97
  4. Step 4: Simplify right side
    2,660.34x = 3,707,111.34
  5. Step 5: Solve for x
    x = 3,707,111.34/2,660.34
  6. Step 6: Final answer
    x = 1,393.47

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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.