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Finding the Fourth Proportional to 2,762.19, 4,143.42 and 814.55

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Solution

The fourth proportional to 2,762.19, 4,143.42 and 814.55 is: 1,221.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,762.19 : 4,143.42 = 814.55 : x
  2. Step 2: Convert to fraction form
    2,762.19/4,143.42 = 814.55/x
  3. Step 3: Cross multiply
    2,762.19x = 4,143.42 × 814.55
  4. Step 4: Simplify right side
    2,762.19x = 3,375,002.04
  5. Step 5: Solve for x
    x = 3,375,002.04/2,762.19
  6. Step 6: Final answer
    x = 1,221.86

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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.