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Finding the Fourth Proportional to 716,343.72, 988,556.61 and 394,078.32

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Solution

The fourth proportional to 716,343.72, 988,556.61 and 394,078.32 is: 543,829.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,343.72 : 988,556.61 = 394,078.32 : x
  2. Step 2: Convert to fraction form
    716,343.72/988,556.61 = 394,078.32/x
  3. Step 3: Cross multiply
    716,343.72x = 988,556.61 × 394,078.32
  4. Step 4: Simplify right side
    716,343.72x = 389,568,728,093.70
  5. Step 5: Solve for x
    x = 389,568,728,093.70/716,343.72
  6. Step 6: Final answer
    x = 543,829.33

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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.