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Finding the Fourth Proportional to 644,361.96, 889,167.38 and 372,447.48

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Solution

The fourth proportional to 644,361.96, 889,167.38 and 372,447.48 is: 513,947.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,361.96 : 889,167.38 = 372,447.48 : x
  2. Step 2: Convert to fraction form
    644,361.96/889,167.38 = 372,447.48/x
  3. Step 3: Cross multiply
    644,361.96x = 889,167.38 × 372,447.48
  4. Step 4: Simplify right side
    644,361.96x = 331,168,149,979.20
  5. Step 5: Solve for x
    x = 331,168,149,979.20/644,361.96
  6. Step 6: Final answer
    x = 513,947.39

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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.