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Finding the Fourth Proportional to 413,830.30, 620,687.85 and 133,375.90

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Solution

The fourth proportional to 413,830.30, 620,687.85 and 133,375.90 is: 200,045.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    413,830.30 : 620,687.85 = 133,375.90 : x
  2. Step 2: Convert to fraction form
    413,830.30/620,687.85 = 133,375.90/x
  3. Step 3: Cross multiply
    413,830.30x = 620,687.85 × 133,375.90
  4. Step 4: Simplify right side
    413,830.30x = 82,784,800,612.82
  5. Step 5: Solve for x
    x = 82,784,800,612.82/413,830.30
  6. Step 6: Final answer
    x = 200,045.29

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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.