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Finding the Fourth Proportional to 644,181.32, 889,806.84 and 490,284.56

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Solution

The fourth proportional to 644,181.32, 889,806.84 and 490,284.56 is: 677,229.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,181.32 : 889,806.84 = 490,284.56 : x
  2. Step 2: Convert to fraction form
    644,181.32/889,806.84 = 490,284.56/x
  3. Step 3: Cross multiply
    644,181.32x = 889,806.84 × 490,284.56
  4. Step 4: Simplify right side
    644,181.32x = 436,258,555,034.39
  5. Step 5: Solve for x
    x = 436,258,555,034.39/644,181.32
  6. Step 6: Final answer
    x = 677,229.44

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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.