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Finding the Fourth Proportional to 663,107,744.80, 995,557,412.40 and 421,243,040.80

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Solution

The fourth proportional to 663,107,744.80, 995,557,412.40 and 421,243,040.80 is: 632,433,620.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,107,744.80 : 995,557,412.40 = 421,243,040.80 : x
  2. Step 2: Convert to fraction form
    663,107,744.80/995,557,412.40 = 421,243,040.80/x
  3. Step 3: Cross multiply
    663,107,744.80x = 995,557,412.40 × 421,243,040.80
  4. Step 4: Simplify right side
    663,107,744.80x = 419,371,631,690,355,648
  5. Step 5: Solve for x
    x = 419,371,631,690,355,648/663,107,744.80
  6. Step 6: Final answer
    x = 632,433,620.30

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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.