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Finding the Fourth Proportional to 521,722.20, 782,583.30 and 255,523.80

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Solution

The fourth proportional to 521,722.20, 782,583.30 and 255,523.80 is: 383,285.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,722.20 : 782,583.30 = 255,523.80 : x
  2. Step 2: Convert to fraction form
    521,722.20/782,583.30 = 255,523.80/x
  3. Step 3: Cross multiply
    521,722.20x = 782,583.30 × 255,523.80
  4. Step 4: Simplify right side
    521,722.20x = 199,968,658,632.54
  5. Step 5: Solve for x
    x = 199,968,658,632.54/521,722.20
  6. Step 6: Final answer
    x = 383,285.70

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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.