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Finding the Fourth Proportional to 525,981,906.80, 788,972,860.20 and 219,493,977.20

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Solution

The fourth proportional to 525,981,906.80, 788,972,860.20 and 219,493,977.20 is: 329,240,965.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,981,906.80 : 788,972,860.20 = 219,493,977.20 : x
  2. Step 2: Convert to fraction form
    525,981,906.80/788,972,860.20 = 219,493,977.20/x
  3. Step 3: Cross multiply
    525,981,906.80x = 788,972,860.20 × 219,493,977.20
  4. Step 4: Simplify right side
    525,981,906.80x = 173,174,790,988,157,600
  5. Step 5: Solve for x
    x = 173,174,790,988,157,600/525,981,906.80
  6. Step 6: Final answer
    x = 329,240,965.80

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Double scale
Find fourth proportional to 525,981,907.80, 788,972,861.70 and 219,493,978.20
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.