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Finding the Fourth Proportional to 919,673.38, 1,379,494 and 413,876.44

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Solution

The fourth proportional to 919,673.38, 1,379,494 and 413,876.44 is: 620,807.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,673.38 : 1,379,494 = 413,876.44 : x
  2. Step 2: Convert to fraction form
    919,673.38/1,379,494 = 413,876.44/x
  3. Step 3: Cross multiply
    919,673.38x = 1,379,494 × 413,876.44
  4. Step 4: Simplify right side
    919,673.38x = 570,940,065,721.36
  5. Step 5: Solve for x
    x = 570,940,065,721.36/919,673.38
  6. Step 6: Final answer
    x = 620,807.43

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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.