Home / 3,215.92-4,828.66-1,979.78

Finding the Fourth Proportional to 3,215.92, 4,828.66 and 1,979.78

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Solution

The fourth proportional to 3,215.92, 4,828.66 and 1,979.78 is: 2,972.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,215.92 : 4,828.66 = 1,979.78 : x
  2. Step 2: Convert to fraction form
    3,215.92/4,828.66 = 1,979.78/x
  3. Step 3: Cross multiply
    3,215.92x = 4,828.66 × 1,979.78
  4. Step 4: Simplify right side
    3,215.92x = 9,559,684.49
  5. Step 5: Solve for x
    x = 9,559,684.49/3,215.92
  6. Step 6: Final answer
    x = 2,972.61

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1.5x scale

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.