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Finding the Fourth Proportional to 376.19, 518.63 and 321.51

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Solution

The fourth proportional to 376.19, 518.63 and 321.51 is: 443.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    376.19 : 518.63 = 321.51 : x
  2. Step 2: Convert to fraction form
    376.19/518.63 = 321.51/x
  3. Step 3: Cross multiply
    376.19x = 518.63 × 321.51
  4. Step 4: Simplify right side
    376.19x = 166,743.12
  5. Step 5: Solve for x
    x = 166,743.12/376.19
  6. Step 6: Final answer
    x = 443.25

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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.