Home / 3,213.90-4,821.21-1,021.86

Finding the Fourth Proportional to 3,213.90, 4,821.21 and 1,021.86

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Solution

The fourth proportional to 3,213.90, 4,821.21 and 1,021.86 is: 1,532.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,213.90 : 4,821.21 = 1,021.86 : x
  2. Step 2: Convert to fraction form
    3,213.90/4,821.21 = 1,021.86/x
  3. Step 3: Cross multiply
    3,213.90x = 4,821.21 × 1,021.86
  4. Step 4: Simplify right side
    3,213.90x = 4,926,601.65
  5. Step 5: Solve for x
    x = 4,926,601.65/3,213.90
  6. Step 6: Final answer
    x = 1,532.90

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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.