Home / 330,198.20-455,503.02-209,135.80

Finding the Fourth Proportional to 330,198.20, 455,503.02 and 209,135.80

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Solution

The fourth proportional to 330,198.20, 455,503.02 and 209,135.80 is: 288,499.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,198.20 : 455,503.02 = 209,135.80 : x
  2. Step 2: Convert to fraction form
    330,198.20/455,503.02 = 209,135.80/x
  3. Step 3: Cross multiply
    330,198.20x = 455,503.02 × 209,135.80
  4. Step 4: Simplify right side
    330,198.20x = 95,261,988,490.12
  5. Step 5: Solve for x
    x = 95,261,988,490.12/330,198.20
  6. Step 6: Final answer
    x = 288,499.42

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.