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Finding the Fourth Proportional to 3,220.65, 4,823.64 and 1,919.43

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Solution

The fourth proportional to 3,220.65, 4,823.64 and 1,919.43 is: 2,874.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,220.65 : 4,823.64 = 1,919.43 : x
  2. Step 2: Convert to fraction form
    3,220.65/4,823.64 = 1,919.43/x
  3. Step 3: Cross multiply
    3,220.65x = 4,823.64 × 1,919.43
  4. Step 4: Simplify right side
    3,220.65x = 9,258,639.33
  5. Step 5: Solve for x
    x = 9,258,639.33/3,220.65
  6. Step 6: Final answer
    x = 2,874.77

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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.