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Finding the Fourth Proportional to 490.35, 735.66 and 165.72

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Solution

The fourth proportional to 490.35, 735.66 and 165.72 is: 248.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    490.35 : 735.66 = 165.72 : x
  2. Step 2: Convert to fraction form
    490.35/735.66 = 165.72/x
  3. Step 3: Cross multiply
    490.35x = 735.66 × 165.72
  4. Step 4: Simplify right side
    490.35x = 121,913.58
  5. Step 5: Solve for x
    x = 121,913.58/490.35
  6. Step 6: Final answer
    x = 248.63

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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.