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Finding the Fourth Proportional to 556,615,693.69, 768,391,177.82 and 321,620,897.97

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Solution

The fourth proportional to 556,615,693.69, 768,391,177.82 and 321,620,897.97 is: 443,987,949.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    556,615,693.69 : 768,391,177.82 = 321,620,897.97 : x
  2. Step 2: Convert to fraction form
    556,615,693.69/768,391,177.82 = 321,620,897.97/x
  3. Step 3: Cross multiply
    556,615,693.69x = 768,391,177.82 × 321,620,897.97
  4. Step 4: Simplify right side
    556,615,693.69x = 247,130,660,601,086,272
  5. Step 5: Solve for x
    x = 247,130,660,601,086,272/556,615,693.69
  6. Step 6: Final answer
    x = 443,987,949.68

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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.