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Finding the Fourth Proportional to 720,940.61, 1,081,472.42 and 188,460.78

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Solution

The fourth proportional to 720,940.61, 1,081,472.42 and 188,460.78 is: 282,707.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,940.61 : 1,081,472.42 = 188,460.78 : x
  2. Step 2: Convert to fraction form
    720,940.61/1,081,472.42 = 188,460.78/x
  3. Step 3: Cross multiply
    720,940.61x = 1,081,472.42 × 188,460.78
  4. Step 4: Simplify right side
    720,940.61x = 203,815,135,821.69
  5. Step 5: Solve for x
    x = 203,815,135,821.69/720,940.61
  6. Step 6: Final answer
    x = 282,707.25

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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.