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Finding the Fourth Proportional to 716,469.74, 988,728.19 and 394,172.92

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Solution

The fourth proportional to 716,469.74, 988,728.19 and 394,172.92 is: 543,958.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,469.74 : 988,728.19 = 394,172.92 : x
  2. Step 2: Convert to fraction form
    716,469.74/988,728.19 = 394,172.92/x
  3. Step 3: Cross multiply
    716,469.74x = 988,728.19 × 394,172.92
  4. Step 4: Simplify right side
    716,469.74x = 389,729,877,738.62
  5. Step 5: Solve for x
    x = 389,729,877,738.62/716,469.74
  6. Step 6: Final answer
    x = 543,958.60

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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.