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Finding the Fourth Proportional to 448.13, 618.18 and 300.81

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Solution

The fourth proportional to 448.13, 618.18 and 300.81 is: 414.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.13 : 618.18 = 300.81 : x
  2. Step 2: Convert to fraction form
    448.13/618.18 = 300.81/x
  3. Step 3: Cross multiply
    448.13x = 618.18 × 300.81
  4. Step 4: Simplify right side
    448.13x = 185,954.73
  5. Step 5: Solve for x
    x = 185,954.73/448.13
  6. Step 6: Final answer
    x = 414.96

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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.