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Finding the Fourth Proportional to 395,104.70, 545,240.30 and 213,812.61

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Solution

The fourth proportional to 395,104.70, 545,240.30 and 213,812.61 is: 295,059.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,104.70 : 545,240.30 = 213,812.61 : x
  2. Step 2: Convert to fraction form
    395,104.70/545,240.30 = 213,812.61/x
  3. Step 3: Cross multiply
    395,104.70x = 545,240.30 × 213,812.61
  4. Step 4: Simplify right side
    395,104.70x = 116,579,250,551.12
  5. Step 5: Solve for x
    x = 116,579,250,551.12/395,104.70
  6. Step 6: Final answer
    x = 295,059.14

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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.