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Finding the Fourth Proportional to 618,375,391.09, 853,768,960.54 and 475,065,914.09

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Solution

The fourth proportional to 618,375,391.09, 853,768,960.54 and 475,065,914.09 is: 655,906,650.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,375,391.09 : 853,768,960.54 = 475,065,914.09 : x
  2. Step 2: Convert to fraction form
    618,375,391.09/853,768,960.54 = 475,065,914.09/x
  3. Step 3: Cross multiply
    618,375,391.09x = 853,768,960.54 × 475,065,914.09
  4. Step 4: Simplify right side
    618,375,391.09x = 405,596,531,655,147,712
  5. Step 5: Solve for x
    x = 405,596,531,655,147,712/618,375,391.09
  6. Step 6: Final answer
    x = 655,906,650.72

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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.