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Finding the Fourth Proportional to 716,352.75, 988,502.00 and 394,076.43

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Solution

The fourth proportional to 716,352.75, 988,502.00 and 394,076.43 is: 543,789.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,352.75 : 988,502.00 = 394,076.43 : x
  2. Step 2: Convert to fraction form
    716,352.75/988,502.00 = 394,076.43/x
  3. Step 3: Cross multiply
    716,352.75x = 988,502.00 × 394,076.43
  4. Step 4: Simplify right side
    716,352.75x = 389,545,337,237.48
  5. Step 5: Solve for x
    x = 389,545,337,237.48/716,352.75
  6. Step 6: Final answer
    x = 543,789.83

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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.