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Finding the Fourth Proportional to 639.99, 959.83 and 250

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Solution

The fourth proportional to 639.99, 959.83 and 250 is: 374.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.99 : 959.83 = 250 : x
  2. Step 2: Convert to fraction form
    639.99/959.83 = 250/x
  3. Step 3: Cross multiply
    639.99x = 959.83 × 250
  4. Step 4: Simplify right side
    639.99x = 239,957.50
  5. Step 5: Solve for x
    x = 239,957.50/639.99
  6. Step 6: Final answer
    x = 374.94

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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.