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Finding the Fourth Proportional to 627.47, 940.30 and 445.22

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Solution

The fourth proportional to 627.47, 940.30 and 445.22 is: 667.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.47 : 940.30 = 445.22 : x
  2. Step 2: Convert to fraction form
    627.47/940.30 = 445.22/x
  3. Step 3: Cross multiply
    627.47x = 940.30 × 445.22
  4. Step 4: Simplify right side
    627.47x = 418,638.14
  5. Step 5: Solve for x
    x = 418,638.14/627.47
  6. Step 6: Final answer
    x = 667.18

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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.