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Finding the Fourth Proportional to 654.55, 979.53 and 447.73

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Solution

The fourth proportional to 654.55, 979.53 and 447.73 is: 670.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    654.55 : 979.53 = 447.73 : x
  2. Step 2: Convert to fraction form
    654.55/979.53 = 447.73/x
  3. Step 3: Cross multiply
    654.55x = 979.53 × 447.73
  4. Step 4: Simplify right side
    654.55x = 438,564.97
  5. Step 5: Solve for x
    x = 438,564.97/654.55
  6. Step 6: Final answer
    x = 670.03

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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.