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Finding the Fourth Proportional to 644,606.46, 889,504.77 and 372,691.80

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Solution

The fourth proportional to 644,606.46, 889,504.77 and 372,691.80 is: 514,284.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,606.46 : 889,504.77 = 372,691.80 : x
  2. Step 2: Convert to fraction form
    644,606.46/889,504.77 = 372,691.80/x
  3. Step 3: Cross multiply
    644,606.46x = 889,504.77 × 372,691.80
  4. Step 4: Simplify right side
    644,606.46x = 331,511,133,839.89
  5. Step 5: Solve for x
    x = 331,511,133,839.89/644,606.46
  6. Step 6: Final answer
    x = 514,284.54

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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.