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Finding the Fourth Proportional to 448.09, 671.78 and 204.55

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Solution

The fourth proportional to 448.09, 671.78 and 204.55 is: 306.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.09 : 671.78 = 204.55 : x
  2. Step 2: Convert to fraction form
    448.09/671.78 = 204.55/x
  3. Step 3: Cross multiply
    448.09x = 671.78 × 204.55
  4. Step 4: Simplify right side
    448.09x = 137,411.43
  5. Step 5: Solve for x
    x = 137,411.43/448.09
  6. Step 6: Final answer
    x = 306.66

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.