Home / 839,912.20-1,259,868.30-520,318.60

Finding the Fourth Proportional to 839,912.20, 1,259,868.30 and 520,318.60

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Solution

The fourth proportional to 839,912.20, 1,259,868.30 and 520,318.60 is: 780,477.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    839,912.20 : 1,259,868.30 = 520,318.60 : x
  2. Step 2: Convert to fraction form
    839,912.20/1,259,868.30 = 520,318.60/x
  3. Step 3: Cross multiply
    839,912.20x = 1,259,868.30 × 520,318.60
  4. Step 4: Simplify right side
    839,912.20x = 655,532,910,040.38
  5. Step 5: Solve for x
    x = 655,532,910,040.38/839,912.20
  6. Step 6: Final answer
    x = 780,477.90

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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.