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Finding the Fourth Proportional to 255,940.80, 383,911.20 and 252,004.20

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Solution

The fourth proportional to 255,940.80, 383,911.20 and 252,004.20 is: 378,006.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,940.80 : 383,911.20 = 252,004.20 : x
  2. Step 2: Convert to fraction form
    255,940.80/383,911.20 = 252,004.20/x
  3. Step 3: Cross multiply
    255,940.80x = 383,911.20 × 252,004.20
  4. Step 4: Simplify right side
    255,940.80x = 96,747,234,827.04
  5. Step 5: Solve for x
    x = 96,747,234,827.04/255,940.80
  6. Step 6: Final answer
    x = 378,006.30

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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.