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Finding the Fourth Proportional to 275,121.90, 384,704.10 and 275,121.90

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Solution

The fourth proportional to 275,121.90, 384,704.10 and 275,121.90 is: 384,704.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,121.90 : 384,704.10 = 275,121.90 : x
  2. Step 2: Convert to fraction form
    275,121.90/384,704.10 = 275,121.90/x
  3. Step 3: Cross multiply
    275,121.90x = 384,704.10 × 275,121.90
  4. Step 4: Simplify right side
    275,121.90x = 105,840,522,929.79
  5. Step 5: Solve for x
    x = 105,840,522,929.79/275,121.90
  6. Step 6: Final answer
    x = 384,704.10

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.