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Finding the Fourth Proportional to 352.39, 486.56 and 228.13

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Solution

The fourth proportional to 352.39, 486.56 and 228.13 is: 314.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    352.39 : 486.56 = 228.13 : x
  2. Step 2: Convert to fraction form
    352.39/486.56 = 228.13/x
  3. Step 3: Cross multiply
    352.39x = 486.56 × 228.13
  4. Step 4: Simplify right side
    352.39x = 110,998.93
  5. Step 5: Solve for x
    x = 110,998.93/352.39
  6. Step 6: Final answer
    x = 314.99

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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.