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Finding the Fourth Proportional to 665.48, 998.33 and 254.63

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Solution

The fourth proportional to 665.48, 998.33 and 254.63 is: 381.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    665.48 : 998.33 = 254.63 : x
  2. Step 2: Convert to fraction form
    665.48/998.33 = 254.63/x
  3. Step 3: Cross multiply
    665.48x = 998.33 × 254.63
  4. Step 4: Simplify right side
    665.48x = 254,198.50
  5. Step 5: Solve for x
    x = 254,198.50/665.48
  6. Step 6: Final answer
    x = 381.98

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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.