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Finding the Fourth Proportional to 379,021.20, 567,840.60 and 308,518.80

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Solution

The fourth proportional to 379,021.20, 567,840.60 and 308,518.80 is: 462,215.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,021.20 : 567,840.60 = 308,518.80 : x
  2. Step 2: Convert to fraction form
    379,021.20/567,840.60 = 308,518.80/x
  3. Step 3: Cross multiply
    379,021.20x = 567,840.60 × 308,518.80
  4. Step 4: Simplify right side
    379,021.20x = 175,189,500,503.28
  5. Step 5: Solve for x
    x = 175,189,500,503.28/379,021.20
  6. Step 6: Final answer
    x = 462,215.57

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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.