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Finding the Fourth Proportional to 489,112.44, 674,688.48 and 307,536.60

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Solution

The fourth proportional to 489,112.44, 674,688.48 and 307,536.60 is: 424,220.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,112.44 : 674,688.48 = 307,536.60 : x
  2. Step 2: Convert to fraction form
    489,112.44/674,688.48 = 307,536.60/x
  3. Step 3: Cross multiply
    489,112.44x = 674,688.48 × 307,536.60
  4. Step 4: Simplify right side
    489,112.44x = 207,491,401,198.37
  5. Step 5: Solve for x
    x = 207,491,401,198.37/489,112.44
  6. Step 6: Final answer
    x = 424,220.25

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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.