Home / 685,729.40-1,029,285.30-331,028.60

Finding the Fourth Proportional to 685,729.40, 1,029,285.30 and 331,028.60

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Solution

The fourth proportional to 685,729.40, 1,029,285.30 and 331,028.60 is: 496,876.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,729.40 : 1,029,285.30 = 331,028.60 : x
  2. Step 2: Convert to fraction form
    685,729.40/1,029,285.30 = 331,028.60/x
  3. Step 3: Cross multiply
    685,729.40x = 1,029,285.30 × 331,028.60
  4. Step 4: Simplify right side
    685,729.40x = 340,722,871,859.58
  5. Step 5: Solve for x
    x = 340,722,871,859.58/685,729.40
  6. Step 6: Final answer
    x = 496,876.57

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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.