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Finding the Fourth Proportional to 352.04, 485.86 and 221.08

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Solution

The fourth proportional to 352.04, 485.86 and 221.08 is: 305.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    352.04 : 485.86 = 221.08 : x
  2. Step 2: Convert to fraction form
    352.04/485.86 = 221.08/x
  3. Step 3: Cross multiply
    352.04x = 485.86 × 221.08
  4. Step 4: Simplify right side
    352.04x = 107,413.93
  5. Step 5: Solve for x
    x = 107,413.93/352.04
  6. Step 6: Final answer
    x = 305.12

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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.