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Finding the Fourth Proportional to 643,882,681.80, 965,949,993.90 and 275,416,921.80

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Solution

The fourth proportional to 643,882,681.80, 965,949,993.90 and 275,416,921.80 is: 413,179,266.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,882,681.80 : 965,949,993.90 = 275,416,921.80 : x
  2. Step 2: Convert to fraction form
    643,882,681.80/965,949,993.90 = 275,416,921.80/x
  3. Step 3: Cross multiply
    643,882,681.80x = 965,949,993.90 × 275,416,921.80
  4. Step 4: Simplify right side
    643,882,681.80x = 266,038,973,932,666,784
  5. Step 5: Solve for x
    x = 266,038,973,932,666,784/643,882,681.80
  6. Step 6: Final answer
    x = 413,179,266.12

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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.