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Finding the Fourth Proportional to 328.40, 452.20 and 270.08

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Solution

The fourth proportional to 328.40, 452.20 and 270.08 is: 371.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.40 : 452.20 = 270.08 : x
  2. Step 2: Convert to fraction form
    328.40/452.20 = 270.08/x
  3. Step 3: Cross multiply
    328.40x = 452.20 × 270.08
  4. Step 4: Simplify right side
    328.40x = 122,130.18
  5. Step 5: Solve for x
    x = 122,130.18/328.40
  6. Step 6: Final answer
    x = 371.89

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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.