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Finding the Fourth Proportional to 638,641,817.70, 957,962,726.55 and 638,641,817.70

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Solution

The fourth proportional to 638,641,817.70, 957,962,726.55 and 638,641,817.70 is: 957,962,726.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,641,817.70 : 957,962,726.55 = 638,641,817.70 : x
  2. Step 2: Convert to fraction form
    638,641,817.70/957,962,726.55 = 638,641,817.70/x
  3. Step 3: Cross multiply
    638,641,817.70x = 957,962,726.55 × 638,641,817.70
  4. Step 4: Simplify right side
    638,641,817.70x = 611,795,056,972,740,096
  5. Step 5: Solve for x
    x = 611,795,056,972,740,096/638,641,817.70
  6. Step 6: Final answer
    x = 957,962,726.55

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Double scale
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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.