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Finding the Fourth Proportional to 455,519.20, 683,278.80 and 206,201.20

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Solution

The fourth proportional to 455,519.20, 683,278.80 and 206,201.20 is: 309,301.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,519.20 : 683,278.80 = 206,201.20 : x
  2. Step 2: Convert to fraction form
    455,519.20/683,278.80 = 206,201.20/x
  3. Step 3: Cross multiply
    455,519.20x = 683,278.80 × 206,201.20
  4. Step 4: Simplify right side
    455,519.20x = 140,892,908,494.56
  5. Step 5: Solve for x
    x = 140,892,908,494.56/455,519.20
  6. Step 6: Final answer
    x = 309,301.80

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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.