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Finding the Fourth Proportional to 221,269,730.90, 309,172,961.50 and 221,269,730.90

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Solution

The fourth proportional to 221,269,730.90, 309,172,961.50 and 221,269,730.90 is: 309,172,961.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,269,730.90 : 309,172,961.50 = 221,269,730.90 : x
  2. Step 2: Convert to fraction form
    221,269,730.90/309,172,961.50 = 221,269,730.90/x
  3. Step 3: Cross multiply
    221,269,730.90x = 309,172,961.50 × 221,269,730.90
  4. Step 4: Simplify right side
    221,269,730.90x = 68,410,617,992,661,064
  5. Step 5: Solve for x
    x = 68,410,617,992,661,064/221,269,730.90
  6. Step 6: Final answer
    x = 309,172,961.50

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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.