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Finding the Fourth Proportional to 489,081.20, 733,621.80 and 447,090.80

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Solution

The fourth proportional to 489,081.20, 733,621.80 and 447,090.80 is: 670,636.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,081.20 : 733,621.80 = 447,090.80 : x
  2. Step 2: Convert to fraction form
    489,081.20/733,621.80 = 447,090.80/x
  3. Step 3: Cross multiply
    489,081.20x = 733,621.80 × 447,090.80
  4. Step 4: Simplify right side
    489,081.20x = 327,995,557,459.44
  5. Step 5: Solve for x
    x = 327,995,557,459.44/489,081.20
  6. Step 6: Final answer
    x = 670,636.20

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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.