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Finding the Fourth Proportional to 667,153.80, 919,757.03 and 422,016.62

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Solution

The fourth proportional to 667,153.80, 919,757.03 and 422,016.62 is: 581,804.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,153.80 : 919,757.03 = 422,016.62 : x
  2. Step 2: Convert to fraction form
    667,153.80/919,757.03 = 422,016.62/x
  3. Step 3: Cross multiply
    667,153.80x = 919,757.03 × 422,016.62
  4. Step 4: Simplify right side
    667,153.80x = 388,152,746,312.97
  5. Step 5: Solve for x
    x = 388,152,746,312.97/667,153.80
  6. Step 6: Final answer
    x = 581,804.00

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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.