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Finding the Fourth Proportional to 279,960,401.20, 419,940,601.80 and 222,139,620.40

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Solution

The fourth proportional to 279,960,401.20, 419,940,601.80 and 222,139,620.40 is: 333,209,430.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,960,401.20 : 419,940,601.80 = 222,139,620.40 : x
  2. Step 2: Convert to fraction form
    279,960,401.20/419,940,601.80 = 222,139,620.40/x
  3. Step 3: Cross multiply
    279,960,401.20x = 419,940,601.80 × 222,139,620.40
  4. Step 4: Simplify right side
    279,960,401.20x = 93,285,445,874,399,568
  5. Step 5: Solve for x
    x = 93,285,445,874,399,568/279,960,401.20
  6. Step 6: Final answer
    x = 333,209,430.60

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1.5x scale

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.