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Finding the Fourth Proportional to 329.12, 451.60 and 316.16

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Solution

The fourth proportional to 329.12, 451.60 and 316.16 is: 433.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    329.12 : 451.60 = 316.16 : x
  2. Step 2: Convert to fraction form
    329.12/451.60 = 316.16/x
  3. Step 3: Cross multiply
    329.12x = 451.60 × 316.16
  4. Step 4: Simplify right side
    329.12x = 142,777.86
  5. Step 5: Solve for x
    x = 142,777.86/329.12
  6. Step 6: Final answer
    x = 433.82

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.