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Finding the Fourth Proportional to 404.38, 556.64 and 352.54

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Solution

The fourth proportional to 404.38, 556.64 and 352.54 is: 485.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    404.38 : 556.64 = 352.54 : x
  2. Step 2: Convert to fraction form
    404.38/556.64 = 352.54/x
  3. Step 3: Cross multiply
    404.38x = 556.64 × 352.54
  4. Step 4: Simplify right side
    404.38x = 196,237.87
  5. Step 5: Solve for x
    x = 196,237.87/404.38
  6. Step 6: Final answer
    x = 485.28

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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.