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Finding the Fourth Proportional to 641,967,843.40, 885,900,635.92 and 377,666,857.08

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Solution

The fourth proportional to 641,967,843.40, 885,900,635.92 and 377,666,857.08 is: 521,171,445.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,967,843.40 : 885,900,635.92 = 377,666,857.08 : x
  2. Step 2: Convert to fraction form
    641,967,843.40/885,900,635.92 = 377,666,857.08/x
  3. Step 3: Cross multiply
    641,967,843.40x = 885,900,635.92 × 377,666,857.08
  4. Step 4: Simplify right side
    641,967,843.40x = 334,575,308,853,079,744
  5. Step 5: Solve for x
    x = 334,575,308,853,079,744/641,967,843.40
  6. Step 6: Final answer
    x = 521,171,445.41

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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.