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Finding the Fourth Proportional to 620,504.84, 856,375.86 and 378,735.68

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Solution

The fourth proportional to 620,504.84, 856,375.86 and 378,735.68 is: 522,703.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,504.84 : 856,375.86 = 378,735.68 : x
  2. Step 2: Convert to fraction form
    620,504.84/856,375.86 = 378,735.68/x
  3. Step 3: Cross multiply
    620,504.84x = 856,375.86 × 378,735.68
  4. Step 4: Simplify right side
    620,504.84x = 324,340,093,672.69
  5. Step 5: Solve for x
    x = 324,340,093,672.69/620,504.84
  6. Step 6: Final answer
    x = 522,703.57

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.