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Finding the Fourth Proportional to 639,361,806.10, 959,042,709.15 and 639,361,806.10

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Solution

The fourth proportional to 639,361,806.10, 959,042,709.15 and 639,361,806.10 is: 959,042,709.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,361,806.10 : 959,042,709.15 = 639,361,806.10 : x
  2. Step 2: Convert to fraction form
    639,361,806.10/959,042,709.15 = 639,361,806.10/x
  3. Step 3: Cross multiply
    639,361,806.10x = 959,042,709.15 × 639,361,806.10
  4. Step 4: Simplify right side
    639,361,806.10x = 613,175,278,649,181,056
  5. Step 5: Solve for x
    x = 613,175,278,649,181,056/639,361,806.10
  6. Step 6: Final answer
    x = 959,042,709.15

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Half scale
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Double scale
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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.