Home / 258,815,590.78-388,416,197.54-189,906,457.54

Finding the Fourth Proportional to 258,815,590.78, 388,416,197.54 and 189,906,457.54

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Solution

The fourth proportional to 258,815,590.78, 388,416,197.54 and 189,906,457.54 is: 285,001,162.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,815,590.78 : 388,416,197.54 = 189,906,457.54 : x
  2. Step 2: Convert to fraction form
    258,815,590.78/388,416,197.54 = 189,906,457.54/x
  3. Step 3: Cross multiply
    258,815,590.78x = 388,416,197.54 × 189,906,457.54
  4. Step 4: Simplify right side
    258,815,590.78x = 73,762,744,125,978,256
  5. Step 5: Solve for x
    x = 73,762,744,125,978,256/258,815,590.78
  6. Step 6: Final answer
    x = 285,001,162.04

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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.