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Finding the Fourth Proportional to 512,555.20, 768,832.80 and 489,227.20

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Solution

The fourth proportional to 512,555.20, 768,832.80 and 489,227.20 is: 733,840.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,555.20 : 768,832.80 = 489,227.20 : x
  2. Step 2: Convert to fraction form
    512,555.20/768,832.80 = 489,227.20/x
  3. Step 3: Cross multiply
    512,555.20x = 768,832.80 × 489,227.20
  4. Step 4: Simplify right side
    512,555.20x = 376,133,918,012.16
  5. Step 5: Solve for x
    x = 376,133,918,012.16/512,555.20
  6. Step 6: Final answer
    x = 733,840.80

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1.5x scale

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.