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Finding the Fourth Proportional to 329.53, 453.69 and 312.22

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Solution

The fourth proportional to 329.53, 453.69 and 312.22 is: 429.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    329.53 : 453.69 = 312.22 : x
  2. Step 2: Convert to fraction form
    329.53/453.69 = 312.22/x
  3. Step 3: Cross multiply
    329.53x = 453.69 × 312.22
  4. Step 4: Simplify right side
    329.53x = 141,649.31
  5. Step 5: Solve for x
    x = 141,649.31/329.53
  6. Step 6: Final answer
    x = 429.85

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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.