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Finding the Fourth Proportional to 479,169.45, 661,466.39 and 309,486.33

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Solution

The fourth proportional to 479,169.45, 661,466.39 and 309,486.33 is: 427,228.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,169.45 : 661,466.39 = 309,486.33 : x
  2. Step 2: Convert to fraction form
    479,169.45/661,466.39 = 309,486.33/x
  3. Step 3: Cross multiply
    479,169.45x = 661,466.39 × 309,486.33
  4. Step 4: Simplify right side
    479,169.45x = 204,714,803,912.02
  5. Step 5: Solve for x
    x = 204,714,803,912.02/479,169.45
  6. Step 6: Final answer
    x = 427,228.41

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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.