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Finding the Fourth Proportional to 448.50, 618.33 and 308.37

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Solution

The fourth proportional to 448.50, 618.33 and 308.37 is: 425.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.50 : 618.33 = 308.37 : x
  2. Step 2: Convert to fraction form
    448.50/618.33 = 308.37/x
  3. Step 3: Cross multiply
    448.50x = 618.33 × 308.37
  4. Step 4: Simplify right side
    448.50x = 190,675.29
  5. Step 5: Solve for x
    x = 190,675.29/448.50
  6. Step 6: Final answer
    x = 425.14

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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.