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Finding the Fourth Proportional to 448.89, 668.93 and 445.11

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Solution

The fourth proportional to 448.89, 668.93 and 445.11 is: 663.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.89 : 668.93 = 445.11 : x
  2. Step 2: Convert to fraction form
    448.89/668.93 = 445.11/x
  3. Step 3: Cross multiply
    448.89x = 668.93 × 445.11
  4. Step 4: Simplify right side
    448.89x = 297,748.55
  5. Step 5: Solve for x
    x = 297,748.55/448.89
  6. Step 6: Final answer
    x = 663.30

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.