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Finding the Fourth Proportional to 328.94, 453.95 and 189.10

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Solution

The fourth proportional to 328.94, 453.95 and 189.10 is: 260.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.94 : 453.95 = 189.10 : x
  2. Step 2: Convert to fraction form
    328.94/453.95 = 189.10/x
  3. Step 3: Cross multiply
    328.94x = 453.95 × 189.10
  4. Step 4: Simplify right side
    328.94x = 85,843.34
  5. Step 5: Solve for x
    x = 85,843.34/328.94
  6. Step 6: Final answer
    x = 260.97

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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.