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Finding the Fourth Proportional to 5,485,909.70, 7,661,377.90 and 5,485,909.70

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Solution

The fourth proportional to 5,485,909.70, 7,661,377.90 and 5,485,909.70 is: 7,661,377.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,485,909.70 : 7,661,377.90 = 5,485,909.70 : x
  2. Step 2: Convert to fraction form
    5,485,909.70/7,661,377.90 = 5,485,909.70/x
  3. Step 3: Cross multiply
    5,485,909.70x = 7,661,377.90 × 5,485,909.70
  4. Step 4: Simplify right side
    5,485,909.70x = 42,029,627,336,975.63
  5. Step 5: Solve for x
    x = 42,029,627,336,975.63/5,485,909.70
  6. Step 6: Final answer
    x = 7,661,377.90

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.