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Finding the Fourth Proportional to 448.12, 618.06 and 331.48

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Solution

The fourth proportional to 448.12, 618.06 and 331.48 is: 457.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.12 : 618.06 = 331.48 : x
  2. Step 2: Convert to fraction form
    448.12/618.06 = 331.48/x
  3. Step 3: Cross multiply
    448.12x = 618.06 × 331.48
  4. Step 4: Simplify right side
    448.12x = 204,874.53
  5. Step 5: Solve for x
    x = 204,874.53/448.12
  6. Step 6: Final answer
    x = 457.19

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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.