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Finding the Fourth Proportional to 280,704.20, 421,445.10 and 221,606.60

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Solution

The fourth proportional to 280,704.20, 421,445.10 and 221,606.60 is: 332,716.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,704.20 : 421,445.10 = 221,606.60 : x
  2. Step 2: Convert to fraction form
    280,704.20/421,445.10 = 221,606.60/x
  3. Step 3: Cross multiply
    280,704.20x = 421,445.10 × 221,606.60
  4. Step 4: Simplify right side
    280,704.20x = 93,395,015,697.66
  5. Step 5: Solve for x
    x = 93,395,015,697.66/280,704.20
  6. Step 6: Final answer
    x = 332,716.84

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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.