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Finding the Fourth Proportional to 721,019.88, 1,081,593 and 188,538.84

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Solution

The fourth proportional to 721,019.88, 1,081,593 and 188,538.84 is: 282,824.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,019.88 : 1,081,593 = 188,538.84 : x
  2. Step 2: Convert to fraction form
    721,019.88/1,081,593 = 188,538.84/x
  3. Step 3: Cross multiply
    721,019.88x = 1,081,593 × 188,538.84
  4. Step 4: Simplify right side
    721,019.88x = 203,922,289,572.12
  5. Step 5: Solve for x
    x = 203,922,289,572.12/721,019.88
  6. Step 6: Final answer
    x = 282,824.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.