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Finding the Fourth Proportional to 365.45, 503.89 and 330.48

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Solution

The fourth proportional to 365.45, 503.89 and 330.48 is: 455.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    365.45 : 503.89 = 330.48 : x
  2. Step 2: Convert to fraction form
    365.45/503.89 = 330.48/x
  3. Step 3: Cross multiply
    365.45x = 503.89 × 330.48
  4. Step 4: Simplify right side
    365.45x = 166,524.74
  5. Step 5: Solve for x
    x = 166,524.74/365.45
  6. Step 6: Final answer
    x = 455.68

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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.