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Finding the Fourth Proportional to 630,436,500.40, 945,654,750.60 and 388,571,796.40

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Solution

The fourth proportional to 630,436,500.40, 945,654,750.60 and 388,571,796.40 is: 582,857,694.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,436,500.40 : 945,654,750.60 = 388,571,796.40 : x
  2. Step 2: Convert to fraction form
    630,436,500.40/945,654,750.60 = 388,571,796.40/x
  3. Step 3: Cross multiply
    630,436,500.40x = 945,654,750.60 × 388,571,796.40
  4. Step 4: Simplify right side
    630,436,500.40x = 367,454,765,214,835,968
  5. Step 5: Solve for x
    x = 367,454,765,214,835,968/630,436,500.40
  6. Step 6: Final answer
    x = 582,857,694.60

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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.