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Finding the Fourth Proportional to 372,379.63, 513,868.76 and 211,231.22

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Solution

The fourth proportional to 372,379.63, 513,868.76 and 211,231.22 is: 291,490.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    372,379.63 : 513,868.76 = 211,231.22 : x
  2. Step 2: Convert to fraction form
    372,379.63/513,868.76 = 211,231.22/x
  3. Step 3: Cross multiply
    372,379.63x = 513,868.76 × 211,231.22
  4. Step 4: Simplify right side
    372,379.63x = 108,545,125,094.69
  5. Step 5: Solve for x
    x = 108,545,125,094.69/372,379.63
  6. Step 6: Final answer
    x = 291,490.50

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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.