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Finding the Fourth Proportional to 328.49, 453.14 and 217.77

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Solution

The fourth proportional to 328.49, 453.14 and 217.77 is: 300.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.49 : 453.14 = 217.77 : x
  2. Step 2: Convert to fraction form
    328.49/453.14 = 217.77/x
  3. Step 3: Cross multiply
    328.49x = 453.14 × 217.77
  4. Step 4: Simplify right side
    328.49x = 98,682.10
  5. Step 5: Solve for x
    x = 98,682.10/328.49
  6. Step 6: Final answer
    x = 300.41

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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.