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Finding the Fourth Proportional to 279,048.85, 418,362.49 and 143,968.21

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Solution

The fourth proportional to 279,048.85, 418,362.49 and 143,968.21 is: 215,843.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,048.85 : 418,362.49 = 143,968.21 : x
  2. Step 2: Convert to fraction form
    279,048.85/418,362.49 = 143,968.21/x
  3. Step 3: Cross multiply
    279,048.85x = 418,362.49 × 143,968.21
  4. Step 4: Simplify right side
    279,048.85x = 60,230,898,816.44
  5. Step 5: Solve for x
    x = 60,230,898,816.44/279,048.85
  6. Step 6: Final answer
    x = 215,843.57

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.