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Finding the Fourth Proportional to 394,958, 545,042.40 and 216,110

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Solution

The fourth proportional to 394,958, 545,042.40 and 216,110 is: 298,232.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,958 : 545,042.40 = 216,110 : x
  2. Step 2: Convert to fraction form
    394,958/545,042.40 = 216,110/x
  3. Step 3: Cross multiply
    394,958x = 545,042.40 × 216,110
  4. Step 4: Simplify right side
    394,958x = 117,789,113,064
  5. Step 5: Solve for x
    x = 117,789,113,064/394,958
  6. Step 6: Final answer
    x = 298,232.00

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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.