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Finding the Fourth Proportional to 665,907,619.20, 998,861,428.80 and 665,907,619.20

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Solution

The fourth proportional to 665,907,619.20, 998,861,428.80 and 665,907,619.20 is: 998,861,428.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,907,619.20 : 998,861,428.80 = 665,907,619.20 : x
  2. Step 2: Convert to fraction form
    665,907,619.20/998,861,428.80 = 665,907,619.20/x
  3. Step 3: Cross multiply
    665,907,619.20x = 998,861,428.80 × 665,907,619.20
  4. Step 4: Simplify right side
    665,907,619.20x = 665,149,435,962,918,272
  5. Step 5: Solve for x
    x = 665,149,435,962,918,272/665,907,619.20
  6. Step 6: Final answer
    x = 998,861,428.80

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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.