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Finding the Fourth Proportional to 451.44, 675.54 and 420.93

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Solution

The fourth proportional to 451.44, 675.54 and 420.93 is: 629.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.44 : 675.54 = 420.93 : x
  2. Step 2: Convert to fraction form
    451.44/675.54 = 420.93/x
  3. Step 3: Cross multiply
    451.44x = 675.54 × 420.93
  4. Step 4: Simplify right side
    451.44x = 284,355.05
  5. Step 5: Solve for x
    x = 284,355.05/451.44
  6. Step 6: Final answer
    x = 629.88

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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.