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Finding the Fourth Proportional to 357.57, 489.06 and 351.90

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Solution

The fourth proportional to 357.57, 489.06 and 351.90 is: 481.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    357.57 : 489.06 = 351.90 : x
  2. Step 2: Convert to fraction form
    357.57/489.06 = 351.90/x
  3. Step 3: Cross multiply
    357.57x = 489.06 × 351.90
  4. Step 4: Simplify right side
    357.57x = 172,100.21
  5. Step 5: Solve for x
    x = 172,100.21/357.57
  6. Step 6: Final answer
    x = 481.30

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.