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Finding the Fourth Proportional to 221,269,694.40, 309,172,910.40 and 221,269,694.40

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Solution

The fourth proportional to 221,269,694.40, 309,172,910.40 and 221,269,694.40 is: 309,172,910.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,269,694.40 : 309,172,910.40 = 221,269,694.40 : x
  2. Step 2: Convert to fraction form
    221,269,694.40/309,172,910.40 = 221,269,694.40/x
  3. Step 3: Cross multiply
    221,269,694.40x = 309,172,910.40 × 221,269,694.40
  4. Step 4: Simplify right side
    221,269,694.40x = 68,410,595,400,966,576
  5. Step 5: Solve for x
    x = 68,410,595,400,966,576/221,269,694.40
  6. Step 6: Final answer
    x = 309,172,910.40

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.