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Finding the Fourth Proportional to 290,803.80, 436,205.70 and 220,819.80

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Solution

The fourth proportional to 290,803.80, 436,205.70 and 220,819.80 is: 331,229.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,803.80 : 436,205.70 = 220,819.80 : x
  2. Step 2: Convert to fraction form
    290,803.80/436,205.70 = 220,819.80/x
  3. Step 3: Cross multiply
    290,803.80x = 436,205.70 × 220,819.80
  4. Step 4: Simplify right side
    290,803.80x = 96,322,855,432.86
  5. Step 5: Solve for x
    x = 96,322,855,432.86/290,803.80
  6. Step 6: Final answer
    x = 331,229.70

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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.