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Finding the Fourth Proportional to 667,108.69, 920,617.23 and 361,191.45

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Solution

The fourth proportional to 667,108.69, 920,617.23 and 361,191.45 is: 498,448.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,108.69 : 920,617.23 = 361,191.45 : x
  2. Step 2: Convert to fraction form
    667,108.69/920,617.23 = 361,191.45/x
  3. Step 3: Cross multiply
    667,108.69x = 920,617.23 × 361,191.45
  4. Step 4: Simplify right side
    667,108.69x = 332,519,072,198.68
  5. Step 5: Solve for x
    x = 332,519,072,198.68/667,108.69
  6. Step 6: Final answer
    x = 498,448.12

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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.