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Finding the Fourth Proportional to 444.75, 662.43 and 421.62

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Solution

The fourth proportional to 444.75, 662.43 and 421.62 is: 627.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    444.75 : 662.43 = 421.62 : x
  2. Step 2: Convert to fraction form
    444.75/662.43 = 421.62/x
  3. Step 3: Cross multiply
    444.75x = 662.43 × 421.62
  4. Step 4: Simplify right side
    444.75x = 279,293.74
  5. Step 5: Solve for x
    x = 279,293.74/444.75
  6. Step 6: Final answer
    x = 627.98

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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.