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Finding the Fourth Proportional to 448.62, 673.52 and 421.89

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Solution

The fourth proportional to 448.62, 673.52 and 421.89 is: 633.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.62 : 673.52 = 421.89 : x
  2. Step 2: Convert to fraction form
    448.62/673.52 = 421.89/x
  3. Step 3: Cross multiply
    448.62x = 673.52 × 421.89
  4. Step 4: Simplify right side
    448.62x = 284,149.24
  5. Step 5: Solve for x
    x = 284,149.24/448.62
  6. Step 6: Final answer
    x = 633.39

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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.