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Finding the Fourth Proportional to 300,203.10, 449,211.15 and 221,471.10

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Solution

The fourth proportional to 300,203.10, 449,211.15 and 221,471.10 is: 331,399.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    300,203.10 : 449,211.15 = 221,471.10 : x
  2. Step 2: Convert to fraction form
    300,203.10/449,211.15 = 221,471.10/x
  3. Step 3: Cross multiply
    300,203.10x = 449,211.15 × 221,471.10
  4. Step 4: Simplify right side
    300,203.10x = 99,487,287,522.77
  5. Step 5: Solve for x
    x = 99,487,287,522.77/300,203.10
  6. Step 6: Final answer
    x = 331,399.93

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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.