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Finding the Fourth Proportional to 525,981,904.80, 788,972,857.20 and 219,493,975.20

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Solution

The fourth proportional to 525,981,904.80, 788,972,857.20 and 219,493,975.20 is: 329,240,962.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,981,904.80 : 788,972,857.20 = 219,493,975.20 : x
  2. Step 2: Convert to fraction form
    525,981,904.80/788,972,857.20 = 219,493,975.20/x
  3. Step 3: Cross multiply
    525,981,904.80x = 788,972,857.20 × 219,493,975.20
  4. Step 4: Simplify right side
    525,981,904.80x = 173,174,788,751,729,952
  5. Step 5: Solve for x
    x = 173,174,788,751,729,952/525,981,904.80
  6. Step 6: Final answer
    x = 329,240,962.80

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Double scale
Find fourth proportional to 525,981,905.80, 788,972,858.70 and 219,493,976.20
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.