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Finding the Fourth Proportional to 393,666.06, 543,289.23 and 223,890.06

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Solution

The fourth proportional to 393,666.06, 543,289.23 and 223,890.06 is: 308,985.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,666.06 : 543,289.23 = 223,890.06 : x
  2. Step 2: Convert to fraction form
    393,666.06/543,289.23 = 223,890.06/x
  3. Step 3: Cross multiply
    393,666.06x = 543,289.23 × 223,890.06
  4. Step 4: Simplify right side
    393,666.06x = 121,637,058,302.05
  5. Step 5: Solve for x
    x = 121,637,058,302.05/393,666.06
  6. Step 6: Final answer
    x = 308,985.38

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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.