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Finding the Fourth Proportional to 618,375,458.66, 853,769,053.69 and 475,065,981.59

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Solution

The fourth proportional to 618,375,458.66, 853,769,053.69 and 475,065,981.59 is: 655,906,743.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,375,458.66 : 853,769,053.69 = 475,065,981.59 : x
  2. Step 2: Convert to fraction form
    618,375,458.66/853,769,053.69 = 475,065,981.59/x
  3. Step 3: Cross multiply
    618,375,458.66x = 853,769,053.69 × 475,065,981.59
  4. Step 4: Simplify right side
    618,375,458.66x = 405,596,633,536,948,736
  5. Step 5: Solve for x
    x = 405,596,633,536,948,736/618,375,458.66
  6. Step 6: Final answer
    x = 655,906,743.81

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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.