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Finding the Fourth Proportional to 512,560.20, 768,840.30 and 489,232.20

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Solution

The fourth proportional to 512,560.20, 768,840.30 and 489,232.20 is: 733,848.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,560.20 : 768,840.30 = 489,232.20 : x
  2. Step 2: Convert to fraction form
    512,560.20/768,840.30 = 489,232.20/x
  3. Step 3: Cross multiply
    512,560.20x = 768,840.30 × 489,232.20
  4. Step 4: Simplify right side
    512,560.20x = 376,141,431,417.66
  5. Step 5: Solve for x
    x = 376,141,431,417.66/512,560.20
  6. Step 6: Final answer
    x = 733,848.30

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Similar ratio
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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.