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Finding the Fourth Proportional to 395,405.92, 545,699.20 and 225,665.44

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Solution

The fourth proportional to 395,405.92, 545,699.20 and 225,665.44 is: 311,440.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,405.92 : 545,699.20 = 225,665.44 : x
  2. Step 2: Convert to fraction form
    395,405.92/545,699.20 = 225,665.44/x
  3. Step 3: Cross multiply
    395,405.92x = 545,699.20 × 225,665.44
  4. Step 4: Simplify right side
    395,405.92x = 123,145,450,075.65
  5. Step 5: Solve for x
    x = 123,145,450,075.65/395,405.92
  6. Step 6: Final answer
    x = 311,440.58

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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.