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Finding the Fourth Proportional to 352.80, 486.96 and 228.45

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Solution

The fourth proportional to 352.80, 486.96 and 228.45 is: 315.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    352.80 : 486.96 = 228.45 : x
  2. Step 2: Convert to fraction form
    352.80/486.96 = 228.45/x
  3. Step 3: Cross multiply
    352.80x = 486.96 × 228.45
  4. Step 4: Simplify right side
    352.80x = 111,246.01
  5. Step 5: Solve for x
    x = 111,246.01/352.80
  6. Step 6: Final answer
    x = 315.33

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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.