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Finding the Fourth Proportional to 643.96, 889.01 and 544.33

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Solution

The fourth proportional to 643.96, 889.01 and 544.33 is: 751.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    643.96 : 889.01 = 544.33 : x
  2. Step 2: Convert to fraction form
    643.96/889.01 = 544.33/x
  3. Step 3: Cross multiply
    643.96x = 889.01 × 544.33
  4. Step 4: Simplify right side
    643.96x = 483,912.09
  5. Step 5: Solve for x
    x = 483,912.09/643.96
  6. Step 6: Final answer
    x = 751.46

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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.