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Finding the Fourth Proportional to 665,622, 998,433 and 222,390

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Solution

The fourth proportional to 665,622, 998,433 and 222,390 is: 333,585

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,622 : 998,433 = 222,390 : x
  2. Step 2: Convert to fraction form
    665,622/998,433 = 222,390/x
  3. Step 3: Cross multiply
    665,622x = 998,433 × 222,390
  4. Step 4: Simplify right side
    665,622x = 222,041,514,870
  5. Step 5: Solve for x
    x = 222,041,514,870/665,622
  6. Step 6: Final answer
    x = 333,585

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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.