Home / 685,821.66-1,028,356.64-212,375.58

Finding the Fourth Proportional to 685,821.66, 1,028,356.64 and 212,375.58

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Solution

The fourth proportional to 685,821.66, 1,028,356.64 and 212,375.58 is: 318,446.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,821.66 : 1,028,356.64 = 212,375.58 : x
  2. Step 2: Convert to fraction form
    685,821.66/1,028,356.64 = 212,375.58/x
  3. Step 3: Cross multiply
    685,821.66x = 1,028,356.64 × 212,375.58
  4. Step 4: Simplify right side
    685,821.66x = 218,397,837,866.85
  5. Step 5: Solve for x
    x = 218,397,837,866.85/685,821.66
  6. Step 6: Final answer
    x = 318,446.98

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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.