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Finding the Fourth Proportional to 667,355.22, 920,961.09 and 365,529.78

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Solution

The fourth proportional to 667,355.22, 920,961.09 and 365,529.78 is: 504,437.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,355.22 : 920,961.09 = 365,529.78 : x
  2. Step 2: Convert to fraction form
    667,355.22/920,961.09 = 365,529.78/x
  3. Step 3: Cross multiply
    667,355.22x = 920,961.09 × 365,529.78
  4. Step 4: Simplify right side
    667,355.22x = 336,638,704,616.26
  5. Step 5: Solve for x
    x = 336,638,704,616.26/667,355.22
  6. Step 6: Final answer
    x = 504,437.06

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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.