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Finding the Fourth Proportional to 685,508.29, 945,989.89 and 379,578.11

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Solution

The fourth proportional to 685,508.29, 945,989.89 and 379,578.11 is: 523,811.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,508.29 : 945,989.89 = 379,578.11 : x
  2. Step 2: Convert to fraction form
    685,508.29/945,989.89 = 379,578.11/x
  3. Step 3: Cross multiply
    685,508.29x = 945,989.89 × 379,578.11
  4. Step 4: Simplify right side
    685,508.29x = 359,077,048,846.41
  5. Step 5: Solve for x
    x = 359,077,048,846.41/685,508.29
  6. Step 6: Final answer
    x = 523,811.39

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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.