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Finding the Fourth Proportional to 449,295.61, 618,974.21 and 313,082.37

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Solution

The fourth proportional to 449,295.61, 618,974.21 and 313,082.37 is: 431,319.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    449,295.61 : 618,974.21 = 313,082.37 : x
  2. Step 2: Convert to fraction form
    449,295.61/618,974.21 = 313,082.37/x
  3. Step 3: Cross multiply
    449,295.61x = 618,974.21 × 313,082.37
  4. Step 4: Simplify right side
    449,295.61x = 193,789,907,975.40
  5. Step 5: Solve for x
    x = 193,789,907,975.40/449,295.61
  6. Step 6: Final answer
    x = 431,319.39

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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.