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Finding the Fourth Proportional to 328.18, 452.78 and 217.52

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Solution

The fourth proportional to 328.18, 452.78 and 217.52 is: 300.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.18 : 452.78 = 217.52 : x
  2. Step 2: Convert to fraction form
    328.18/452.78 = 217.52/x
  3. Step 3: Cross multiply
    328.18x = 452.78 × 217.52
  4. Step 4: Simplify right side
    328.18x = 98,488.71
  5. Step 5: Solve for x
    x = 98,488.71/328.18
  6. Step 6: Final answer
    x = 300.11

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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.