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Finding the Fourth Proportional to 449.09, 618.41 and 416.42

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Solution

The fourth proportional to 449.09, 618.41 and 416.42 is: 573.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    449.09 : 618.41 = 416.42 : x
  2. Step 2: Convert to fraction form
    449.09/618.41 = 416.42/x
  3. Step 3: Cross multiply
    449.09x = 618.41 × 416.42
  4. Step 4: Simplify right side
    449.09x = 257,516.21
  5. Step 5: Solve for x
    x = 257,516.21/449.09
  6. Step 6: Final answer
    x = 573.42

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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.