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Finding the Fourth Proportional to 221,269,729.90, 309,172,960.10 and 221,269,729.90

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Solution

The fourth proportional to 221,269,729.90, 309,172,960.10 and 221,269,729.90 is: 309,172,960.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,269,729.90 : 309,172,960.10 = 221,269,729.90 : x
  2. Step 2: Convert to fraction form
    221,269,729.90/309,172,960.10 = 221,269,729.90/x
  3. Step 3: Cross multiply
    221,269,729.90x = 309,172,960.10 × 221,269,729.90
  4. Step 4: Simplify right side
    221,269,729.90x = 68,410,617,373,710,488
  5. Step 5: Solve for x
    x = 68,410,617,373,710,488/221,269,729.90
  6. Step 6: Final answer
    x = 309,172,960.10

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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.