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Finding the Fourth Proportional to 323,740,803.20, 485,611,204.80 and 289,728,579.20

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Solution

The fourth proportional to 323,740,803.20, 485,611,204.80 and 289,728,579.20 is: 434,592,868.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,740,803.20 : 485,611,204.80 = 289,728,579.20 : x
  2. Step 2: Convert to fraction form
    323,740,803.20/485,611,204.80 = 289,728,579.20/x
  3. Step 3: Cross multiply
    323,740,803.20x = 485,611,204.80 × 289,728,579.20
  4. Step 4: Simplify right side
    323,740,803.20x = 140,695,444,410,304,224
  5. Step 5: Solve for x
    x = 140,695,444,410,304,224/323,740,803.20
  6. Step 6: Final answer
    x = 434,592,868.80

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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.