Home / 685,824.66-1,028,361.14-212,378.58

Finding the Fourth Proportional to 685,824.66, 1,028,361.14 and 212,378.58

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Solution

The fourth proportional to 685,824.66, 1,028,361.14 and 212,378.58 is: 318,451.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,824.66 : 1,028,361.14 = 212,378.58 : x
  2. Step 2: Convert to fraction form
    685,824.66/1,028,361.14 = 212,378.58/x
  3. Step 3: Cross multiply
    685,824.66x = 1,028,361.14 × 212,378.58
  4. Step 4: Simplify right side
    685,824.66x = 218,401,878,640.38
  5. Step 5: Solve for x
    x = 218,401,878,640.38/685,824.66
  6. Step 6: Final answer
    x = 318,451.48

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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.