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Finding the Fourth Proportional to 484.21, 726.20 and 137.58

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Solution

The fourth proportional to 484.21, 726.20 and 137.58 is: 206.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    484.21 : 726.20 = 137.58 : x
  2. Step 2: Convert to fraction form
    484.21/726.20 = 137.58/x
  3. Step 3: Cross multiply
    484.21x = 726.20 × 137.58
  4. Step 4: Simplify right side
    484.21x = 99,910.60
  5. Step 5: Solve for x
    x = 99,910.60/484.21
  6. Step 6: Final answer
    x = 206.34

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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.