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Finding the Fourth Proportional to 379,697.60, 569,632.80 and 221,844.80

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Solution

The fourth proportional to 379,697.60, 569,632.80 and 221,844.80 is: 332,817.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,697.60 : 569,632.80 = 221,844.80 : x
  2. Step 2: Convert to fraction form
    379,697.60/569,632.80 = 221,844.80/x
  3. Step 3: Cross multiply
    379,697.60x = 569,632.80 × 221,844.80
  4. Step 4: Simplify right side
    379,697.60x = 126,370,074,589.44
  5. Step 5: Solve for x
    x = 126,370,074,589.44/379,697.60
  6. Step 6: Final answer
    x = 332,817.68

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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.