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Finding the Fourth Proportional to 667,119.50, 920,249.09 and 422,028.23

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Solution

The fourth proportional to 667,119.50, 920,249.09 and 422,028.23 is: 582,161.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,119.50 : 920,249.09 = 422,028.23 : x
  2. Step 2: Convert to fraction form
    667,119.50/920,249.09 = 422,028.23/x
  3. Step 3: Cross multiply
    667,119.50x = 920,249.09 × 422,028.23
  4. Step 4: Simplify right side
    667,119.50x = 388,371,087,900.42
  5. Step 5: Solve for x
    x = 388,371,087,900.42/667,119.50
  6. Step 6: Final answer
    x = 582,161.20

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1.5x scale

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.