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Finding the Fourth Proportional to 280,898.80, 421,348.20 and 252,905.20

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Solution

The fourth proportional to 280,898.80, 421,348.20 and 252,905.20 is: 379,357.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,898.80 : 421,348.20 = 252,905.20 : x
  2. Step 2: Convert to fraction form
    280,898.80/421,348.20 = 252,905.20/x
  3. Step 3: Cross multiply
    280,898.80x = 421,348.20 × 252,905.20
  4. Step 4: Simplify right side
    280,898.80x = 106,561,150,790.64
  5. Step 5: Solve for x
    x = 106,561,150,790.64/280,898.80
  6. Step 6: Final answer
    x = 379,357.80

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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.