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Finding the Fourth Proportional to 352.05, 485.55 and 258.76

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Solution

The fourth proportional to 352.05, 485.55 and 258.76 is: 356.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    352.05 : 485.55 = 258.76 : x
  2. Step 2: Convert to fraction form
    352.05/485.55 = 258.76/x
  3. Step 3: Cross multiply
    352.05x = 485.55 × 258.76
  4. Step 4: Simplify right side
    352.05x = 125,640.92
  5. Step 5: Solve for x
    x = 125,640.92/352.05
  6. Step 6: Final answer
    x = 356.88

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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.