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Finding the Fourth Proportional to 448.05, 618.60 and 308.13

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Solution

The fourth proportional to 448.05, 618.60 and 308.13 is: 425.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.05 : 618.60 = 308.13 : x
  2. Step 2: Convert to fraction form
    448.05/618.60 = 308.13/x
  3. Step 3: Cross multiply
    448.05x = 618.60 × 308.13
  4. Step 4: Simplify right side
    448.05x = 190,609.22
  5. Step 5: Solve for x
    x = 190,609.22/448.05
  6. Step 6: Final answer
    x = 425.42

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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.