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Finding the Fourth Proportional to 639,738,007.70, 957,906,400.35 and 639,738,007.70

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Solution

The fourth proportional to 639,738,007.70, 957,906,400.35 and 639,738,007.70 is: 957,906,400.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,738,007.70 : 957,906,400.35 = 639,738,007.70 : x
  2. Step 2: Convert to fraction form
    639,738,007.70/957,906,400.35 = 639,738,007.70/x
  3. Step 3: Cross multiply
    639,738,007.70x = 957,906,400.35 × 639,738,007.70
  4. Step 4: Simplify right side
    639,738,007.70x = 612,809,132,122,987,648
  5. Step 5: Solve for x
    x = 612,809,132,122,987,648/639,738,007.70
  6. Step 6: Final answer
    x = 957,906,400.35

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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.