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Finding the Fourth Proportional to 644,334.26, 889,129.22 and 372,419.75

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Solution

The fourth proportional to 644,334.26, 889,129.22 and 372,419.75 is: 513,909.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,334.26 : 889,129.22 = 372,419.75 : x
  2. Step 2: Convert to fraction form
    644,334.26/889,129.22 = 372,419.75/x
  3. Step 3: Cross multiply
    644,334.26x = 889,129.22 × 372,419.75
  4. Step 4: Simplify right side
    644,334.26x = 331,129,275,522.35
  5. Step 5: Solve for x
    x = 331,129,275,522.35/644,334.26
  6. Step 6: Final answer
    x = 513,909.16

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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.