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Finding the Fourth Proportional to 448.05, 671.81 and 204.78

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Solution

The fourth proportional to 448.05, 671.81 and 204.78 is: 307.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.05 : 671.81 = 204.78 : x
  2. Step 2: Convert to fraction form
    448.05/671.81 = 204.78/x
  3. Step 3: Cross multiply
    448.05x = 671.81 × 204.78
  4. Step 4: Simplify right side
    448.05x = 137,572.23
  5. Step 5: Solve for x
    x = 137,572.23/448.05
  6. Step 6: Final answer
    x = 307.05

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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.