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Finding the Fourth Proportional to 343.38, 518.12 and 328.40

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Solution

The fourth proportional to 343.38, 518.12 and 328.40 is: 495.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    343.38 : 518.12 = 328.40 : x
  2. Step 2: Convert to fraction form
    343.38/518.12 = 328.40/x
  3. Step 3: Cross multiply
    343.38x = 518.12 × 328.40
  4. Step 4: Simplify right side
    343.38x = 170,146.38
  5. Step 5: Solve for x
    x = 170,146.38/343.38
  6. Step 6: Final answer
    x = 495.50

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.