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Finding the Fourth Proportional to 379,693.60, 569,626.80 and 221,840.80

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Solution

The fourth proportional to 379,693.60, 569,626.80 and 221,840.80 is: 332,811.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,693.60 : 569,626.80 = 221,840.80 : x
  2. Step 2: Convert to fraction form
    379,693.60/569,626.80 = 221,840.80/x
  3. Step 3: Cross multiply
    379,693.60x = 569,626.80 × 221,840.80
  4. Step 4: Simplify right side
    379,693.60x = 126,366,465,013.44
  5. Step 5: Solve for x
    x = 126,366,465,013.44/379,693.60
  6. Step 6: Final answer
    x = 332,811.68

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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.