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Finding the Fourth Proportional to 839,903.40, 1,259,855.10 and 825,906.60

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Solution

The fourth proportional to 839,903.40, 1,259,855.10 and 825,906.60 is: 1,238,859.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    839,903.40 : 1,259,855.10 = 825,906.60 : x
  2. Step 2: Convert to fraction form
    839,903.40/1,259,855.10 = 825,906.60/x
  3. Step 3: Cross multiply
    839,903.40x = 1,259,855.10 × 825,906.60
  4. Step 4: Simplify right side
    839,903.40x = 1,040,522,642,133.66
  5. Step 5: Solve for x
    x = 1,040,522,642,133.66/839,903.40
  6. Step 6: Final answer
    x = 1,238,859.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.