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Finding the Fourth Proportional to 805,140,930.60, 1,207,711,395.90 and 805,140,930.60

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Solution

The fourth proportional to 805,140,930.60, 1,207,711,395.90 and 805,140,930.60 is: 1,207,711,395.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    805,140,930.60 : 1,207,711,395.90 = 805,140,930.60 : x
  2. Step 2: Convert to fraction form
    805,140,930.60/1,207,711,395.90 = 805,140,930.60/x
  3. Step 3: Cross multiply
    805,140,930.60x = 1,207,711,395.90 × 805,140,930.60
  4. Step 4: Simplify right side
    805,140,930.60x = 972,377,877,191,151,104
  5. Step 5: Solve for x
    x = 972,377,877,191,151,104/805,140,930.60
  6. Step 6: Final answer
    x = 1,207,711,395.90

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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.