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Finding the Fourth Proportional to 820,628.28, 1,132,656 and 481,205.88

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Solution

The fourth proportional to 820,628.28, 1,132,656 and 481,205.88 is: 664,174.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,628.28 : 1,132,656 = 481,205.88 : x
  2. Step 2: Convert to fraction form
    820,628.28/1,132,656 = 481,205.88/x
  3. Step 3: Cross multiply
    820,628.28x = 1,132,656 × 481,205.88
  4. Step 4: Simplify right side
    820,628.28x = 545,040,727,217.28
  5. Step 5: Solve for x
    x = 545,040,727,217.28/820,628.28
  6. Step 6: Final answer
    x = 664,174.93

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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.