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Finding the Fourth Proportional to 352.61, 485.96 and 290.04

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Solution

The fourth proportional to 352.61, 485.96 and 290.04 is: 399.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    352.61 : 485.96 = 290.04 : x
  2. Step 2: Convert to fraction form
    352.61/485.96 = 290.04/x
  3. Step 3: Cross multiply
    352.61x = 485.96 × 290.04
  4. Step 4: Simplify right side
    352.61x = 140,947.84
  5. Step 5: Solve for x
    x = 140,947.84/352.61
  6. Step 6: Final answer
    x = 399.73

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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.