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Finding the Fourth Proportional to 716,651.85, 988,958.54 and 394,361.73

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Solution

The fourth proportional to 716,651.85, 988,958.54 and 394,361.73 is: 544,207.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,651.85 : 988,958.54 = 394,361.73 : x
  2. Step 2: Convert to fraction form
    716,651.85/988,958.54 = 394,361.73/x
  3. Step 3: Cross multiply
    716,651.85x = 988,958.54 × 394,361.73
  4. Step 4: Simplify right side
    716,651.85x = 390,007,398,760.87
  5. Step 5: Solve for x
    x = 390,007,398,760.87/716,651.85
  6. Step 6: Final answer
    x = 544,207.62

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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.