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Finding the Fourth Proportional to 448.94, 618.23 and 399.26

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Solution

The fourth proportional to 448.94, 618.23 and 399.26 is: 549.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.94 : 618.23 = 399.26 : x
  2. Step 2: Convert to fraction form
    448.94/618.23 = 399.26/x
  3. Step 3: Cross multiply
    448.94x = 618.23 × 399.26
  4. Step 4: Simplify right side
    448.94x = 246,837.05
  5. Step 5: Solve for x
    x = 246,837.05/448.94
  6. Step 6: Final answer
    x = 549.82

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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.