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Finding the Fourth Proportional to 1,990,509.78, 2,985,766.83 and 494,601.78

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Solution

The fourth proportional to 1,990,509.78, 2,985,766.83 and 494,601.78 is: 741,903.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,990,509.78 : 2,985,766.83 = 494,601.78 : x
  2. Step 2: Convert to fraction form
    1,990,509.78/2,985,766.83 = 494,601.78/x
  3. Step 3: Cross multiply
    1,990,509.78x = 2,985,766.83 × 494,601.78
  4. Step 4: Simplify right side
    1,990,509.78x = 1,476,765,588,782.96
  5. Step 5: Solve for x
    x = 1,476,765,588,782.96/1,990,509.78
  6. Step 6: Final answer
    x = 741,903.21

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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.