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Finding the Fourth Proportional to 221,405.45, 331,616.10 and 221,405.45

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Solution

The fourth proportional to 221,405.45, 331,616.10 and 221,405.45 is: 331,616.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,405.45 : 331,616.10 = 221,405.45 : x
  2. Step 2: Convert to fraction form
    221,405.45/331,616.10 = 221,405.45/x
  3. Step 3: Cross multiply
    221,405.45x = 331,616.10 × 221,405.45
  4. Step 4: Simplify right side
    221,405.45x = 73,421,611,847.75
  5. Step 5: Solve for x
    x = 73,421,611,847.75/221,405.45
  6. Step 6: Final answer
    x = 331,616.10

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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.