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Finding the Fourth Proportional to 667,163.30, 919,770.15 and 422,026.10

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Solution

The fourth proportional to 667,163.30, 919,770.15 and 422,026.10 is: 581,817.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,163.30 : 919,770.15 = 422,026.10 : x
  2. Step 2: Convert to fraction form
    667,163.30/919,770.15 = 422,026.10/x
  3. Step 3: Cross multiply
    667,163.30x = 919,770.15 × 422,026.10
  4. Step 4: Simplify right side
    667,163.30x = 388,167,009,300.92
  5. Step 5: Solve for x
    x = 388,167,009,300.92/667,163.30
  6. Step 6: Final answer
    x = 581,817.09

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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.