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Finding the Fourth Proportional to 448.94, 619.64 and 274.38

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Solution

The fourth proportional to 448.94, 619.64 and 274.38 is: 378.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.94 : 619.64 = 274.38 : x
  2. Step 2: Convert to fraction form
    448.94/619.64 = 274.38/x
  3. Step 3: Cross multiply
    448.94x = 619.64 × 274.38
  4. Step 4: Simplify right side
    448.94x = 170,015.45
  5. Step 5: Solve for x
    x = 170,015.45/448.94
  6. Step 6: Final answer
    x = 378.71

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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.