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Finding the Fourth Proportional to 667,995.10, 921,891.55 and 366,247.42

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Solution

The fourth proportional to 667,995.10, 921,891.55 and 366,247.42 is: 505,453.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,995.10 : 921,891.55 = 366,247.42 : x
  2. Step 2: Convert to fraction form
    667,995.10/921,891.55 = 366,247.42/x
  3. Step 3: Cross multiply
    667,995.10x = 921,891.55 × 366,247.42
  4. Step 4: Simplify right side
    667,995.10x = 337,640,398,486.95
  5. Step 5: Solve for x
    x = 337,640,398,486.95/667,995.10
  6. Step 6: Final answer
    x = 505,453.41

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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.