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Finding the Fourth Proportional to 351.96, 485.30 and 330.77

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Solution

The fourth proportional to 351.96, 485.30 and 330.77 is: 456.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    351.96 : 485.30 = 330.77 : x
  2. Step 2: Convert to fraction form
    351.96/485.30 = 330.77/x
  3. Step 3: Cross multiply
    351.96x = 485.30 × 330.77
  4. Step 4: Simplify right side
    351.96x = 160,522.68
  5. Step 5: Solve for x
    x = 160,522.68/351.96
  6. Step 6: Final answer
    x = 456.08

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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.