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Finding the Fourth Proportional to 328.22, 453.33 and 217.50

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Solution

The fourth proportional to 328.22, 453.33 and 217.50 is: 300.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.22 : 453.33 = 217.50 : x
  2. Step 2: Convert to fraction form
    328.22/453.33 = 217.50/x
  3. Step 3: Cross multiply
    328.22x = 453.33 × 217.50
  4. Step 4: Simplify right side
    328.22x = 98,598.19
  5. Step 5: Solve for x
    x = 98,598.19/328.22
  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.