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Finding the Fourth Proportional to 335.21, 499.48 and 325.78

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Solution

The fourth proportional to 335.21, 499.48 and 325.78 is: 485.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    335.21 : 499.48 = 325.78 : x
  2. Step 2: Convert to fraction form
    335.21/499.48 = 325.78/x
  3. Step 3: Cross multiply
    335.21x = 499.48 × 325.78
  4. Step 4: Simplify right side
    335.21x = 162,718.53
  5. Step 5: Solve for x
    x = 162,718.53/335.21
  6. Step 6: Final answer
    x = 485.43

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.