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Finding the Fourth Proportional to 360.69, 495.99 and 321.45

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Solution

The fourth proportional to 360.69, 495.99 and 321.45 is: 442.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    360.69 : 495.99 = 321.45 : x
  2. Step 2: Convert to fraction form
    360.69/495.99 = 321.45/x
  3. Step 3: Cross multiply
    360.69x = 495.99 × 321.45
  4. Step 4: Simplify right side
    360.69x = 159,435.99
  5. Step 5: Solve for x
    x = 159,435.99/360.69
  6. Step 6: Final answer
    x = 442.03

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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.