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Finding the Fourth Proportional to 320,572.36, 481,009.74 and 143,063.56

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Solution

The fourth proportional to 320,572.36, 481,009.74 and 143,063.56 is: 214,662.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,572.36 : 481,009.74 = 143,063.56 : x
  2. Step 2: Convert to fraction form
    320,572.36/481,009.74 = 143,063.56/x
  3. Step 3: Cross multiply
    320,572.36x = 481,009.74 × 143,063.56
  4. Step 4: Simplify right side
    320,572.36x = 68,814,965,799.07
  5. Step 5: Solve for x
    x = 68,814,965,799.07/320,572.36
  6. Step 6: Final answer
    x = 214,662.82

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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.