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Finding the Fourth Proportional to 705,794,224.59, 973,990,654.80 and 388,247,650.20

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Solution

The fourth proportional to 705,794,224.59, 973,990,654.80 and 388,247,650.20 is: 535,778,800.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    705,794,224.59 : 973,990,654.80 = 388,247,650.20 : x
  2. Step 2: Convert to fraction form
    705,794,224.59/973,990,654.80 = 388,247,650.20/x
  3. Step 3: Cross multiply
    705,794,224.59x = 973,990,654.80 × 388,247,650.20
  4. Step 4: Simplify right side
    705,794,224.59x = 378,149,583,042,859,328
  5. Step 5: Solve for x
    x = 378,149,583,042,859,328/705,794,224.59
  6. Step 6: Final answer
    x = 535,778,800.49

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.