Home / 685,674.40-1,028,511.60-212,504.80

Finding the Fourth Proportional to 685,674.40, 1,028,511.60 and 212,504.80

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Solution

The fourth proportional to 685,674.40, 1,028,511.60 and 212,504.80 is: 318,757.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,674.40 : 1,028,511.60 = 212,504.80 : x
  2. Step 2: Convert to fraction form
    685,674.40/1,028,511.60 = 212,504.80/x
  3. Step 3: Cross multiply
    685,674.40x = 1,028,511.60 × 212,504.80
  4. Step 4: Simplify right side
    685,674.40x = 218,563,651,855.68
  5. Step 5: Solve for x
    x = 218,563,651,855.68/685,674.40
  6. Step 6: Final answer
    x = 318,757.20

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Similar ratio
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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.