Home / 378,939.34-522,935.22-209,172.25

Finding the Fourth Proportional to 378,939.34, 522,935.22 and 209,172.25

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Solution

The fourth proportional to 378,939.34, 522,935.22 and 209,172.25 is: 288,657.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,939.34 : 522,935.22 = 209,172.25 : x
  2. Step 2: Convert to fraction form
    378,939.34/522,935.22 = 209,172.25/x
  3. Step 3: Cross multiply
    378,939.34x = 522,935.22 × 209,172.25
  4. Step 4: Simplify right side
    378,939.34x = 109,383,536,571.65
  5. Step 5: Solve for x
    x = 109,383,536,571.65/378,939.34
  6. Step 6: Final answer
    x = 288,657.11

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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.