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Finding the Fourth Proportional to 395,100.87, 545,239.17 and 213,812.77

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Solution

The fourth proportional to 395,100.87, 545,239.17 and 213,812.77 is: 295,061.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,100.87 : 545,239.17 = 213,812.77 : x
  2. Step 2: Convert to fraction form
    395,100.87/545,239.17 = 213,812.77/x
  3. Step 3: Cross multiply
    395,100.87x = 545,239.17 × 213,812.77
  4. Step 4: Simplify right side
    395,100.87x = 116,579,097,250.20
  5. Step 5: Solve for x
    x = 116,579,097,250.20/395,100.87
  6. Step 6: Final answer
    x = 295,061.61

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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.