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Finding the Fourth Proportional to 328.09, 452.70 and 223.40

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Solution

The fourth proportional to 328.09, 452.70 and 223.40 is: 308.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.09 : 452.70 = 223.40 : x
  2. Step 2: Convert to fraction form
    328.09/452.70 = 223.40/x
  3. Step 3: Cross multiply
    328.09x = 452.70 × 223.40
  4. Step 4: Simplify right side
    328.09x = 101,133.18
  5. Step 5: Solve for x
    x = 101,133.18/328.09
  6. Step 6: Final answer
    x = 308.25

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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.