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Finding the Fourth Proportional to 448.42, 676.36 and 445.72

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Solution

The fourth proportional to 448.42, 676.36 and 445.72 is: 672.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.42 : 676.36 = 445.72 : x
  2. Step 2: Convert to fraction form
    448.42/676.36 = 445.72/x
  3. Step 3: Cross multiply
    448.42x = 676.36 × 445.72
  4. Step 4: Simplify right side
    448.42x = 301,467.18
  5. Step 5: Solve for x
    x = 301,467.18/448.42
  6. Step 6: Final answer
    x = 672.29

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.