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Finding the Fourth Proportional to 331.23, 499.74 and 330.32

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Solution

The fourth proportional to 331.23, 499.74 and 330.32 is: 498.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.23 : 499.74 = 330.32 : x
  2. Step 2: Convert to fraction form
    331.23/499.74 = 330.32/x
  3. Step 3: Cross multiply
    331.23x = 499.74 × 330.32
  4. Step 4: Simplify right side
    331.23x = 165,075.37
  5. Step 5: Solve for x
    x = 165,075.37/331.23
  6. Step 6: Final answer
    x = 498.37

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.