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Finding the Fourth Proportional to 448.78, 619.42 and 333.22

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Solution

The fourth proportional to 448.78, 619.42 and 333.22 is: 459.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.78 : 619.42 = 333.22 : x
  2. Step 2: Convert to fraction form
    448.78/619.42 = 333.22/x
  3. Step 3: Cross multiply
    448.78x = 619.42 × 333.22
  4. Step 4: Simplify right side
    448.78x = 206,403.13
  5. Step 5: Solve for x
    x = 206,403.13/448.78
  6. Step 6: Final answer
    x = 459.92

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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.