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Finding the Fourth Proportional to 639.37, 959.19 and 310.54

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Solution

The fourth proportional to 639.37, 959.19 and 310.54 is: 465.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.37 : 959.19 = 310.54 : x
  2. Step 2: Convert to fraction form
    639.37/959.19 = 310.54/x
  3. Step 3: Cross multiply
    639.37x = 959.19 × 310.54
  4. Step 4: Simplify right side
    639.37x = 297,866.86
  5. Step 5: Solve for x
    x = 297,866.86/639.37
  6. Step 6: Final answer
    x = 465.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.