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Finding the Fourth Proportional to 489.21, 673.77 and 453.97

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Solution

The fourth proportional to 489.21, 673.77 and 453.97 is: 625.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    489.21 : 673.77 = 453.97 : x
  2. Step 2: Convert to fraction form
    489.21/673.77 = 453.97/x
  3. Step 3: Cross multiply
    489.21x = 673.77 × 453.97
  4. Step 4: Simplify right side
    489.21x = 305,871.36
  5. Step 5: Solve for x
    x = 305,871.36/489.21
  6. Step 6: Final answer
    x = 625.24

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.