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Finding the Fourth Proportional to 496.21, 684.47 and 330.25

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Solution

The fourth proportional to 496.21, 684.47 and 330.25 is: 455.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    496.21 : 684.47 = 330.25 : x
  2. Step 2: Convert to fraction form
    496.21/684.47 = 330.25/x
  3. Step 3: Cross multiply
    496.21x = 684.47 × 330.25
  4. Step 4: Simplify right side
    496.21x = 226,041.14
  5. Step 5: Solve for x
    x = 226,041.14/496.21
  6. Step 6: Final answer
    x = 455.54

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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.