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Finding the Fourth Proportional to 465.92, 643.36 and 328

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Solution

The fourth proportional to 465.92, 643.36 and 328 is: 452.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    465.92 : 643.36 = 328 : x
  2. Step 2: Convert to fraction form
    465.92/643.36 = 328/x
  3. Step 3: Cross multiply
    465.92x = 643.36 × 328
  4. Step 4: Simplify right side
    465.92x = 211,022.08
  5. Step 5: Solve for x
    x = 211,022.08/465.92
  6. Step 6: Final answer
    x = 452.91

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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.