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Finding the Fourth Proportional to 820,640.42, 1,131,128.03 and 548,608.94

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Solution

The fourth proportional to 820,640.42, 1,131,128.03 and 548,608.94 is: 756,174.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,640.42 : 1,131,128.03 = 548,608.94 : x
  2. Step 2: Convert to fraction form
    820,640.42/1,131,128.03 = 548,608.94/x
  3. Step 3: Cross multiply
    820,640.42x = 1,131,128.03 × 548,608.94
  4. Step 4: Simplify right side
    820,640.42x = 620,546,941,143.90
  5. Step 5: Solve for x
    x = 620,546,941,143.90/820,640.42
  6. Step 6: Final answer
    x = 756,174.00

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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.