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Finding the Fourth Proportional to 328.94, 453.99 and 189.05

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Solution

The fourth proportional to 328.94, 453.99 and 189.05 is: 260.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.94 : 453.99 = 189.05 : x
  2. Step 2: Convert to fraction form
    328.94/453.99 = 189.05/x
  3. Step 3: Cross multiply
    328.94x = 453.99 × 189.05
  4. Step 4: Simplify right side
    328.94x = 85,825.25
  5. Step 5: Solve for x
    x = 85,825.25/328.94
  6. Step 6: Final answer
    x = 260.92

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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.