Home / 3,215.05-4,827.81-1,990.27

Finding the Fourth Proportional to 3,215.05, 4,827.81 and 1,990.27

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Solution

The fourth proportional to 3,215.05, 4,827.81 and 1,990.27 is: 2,988.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,215.05 : 4,827.81 = 1,990.27 : x
  2. Step 2: Convert to fraction form
    3,215.05/4,827.81 = 1,990.27/x
  3. Step 3: Cross multiply
    3,215.05x = 4,827.81 × 1,990.27
  4. Step 4: Simplify right side
    3,215.05x = 9,608,645.41
  5. Step 5: Solve for x
    x = 9,608,645.41/3,215.05
  6. Step 6: Final answer
    x = 2,988.65

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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.