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Finding the Fourth Proportional to 255.00, 382.38 and 90.44

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Solution

The fourth proportional to 255.00, 382.38 and 90.44 is: 135.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    255.00 : 382.38 = 90.44 : x
  2. Step 2: Convert to fraction form
    255.00/382.38 = 90.44/x
  3. Step 3: Cross multiply
    255.00x = 382.38 × 90.44
  4. Step 4: Simplify right side
    255.00x = 34,583.34
  5. Step 5: Solve for x
    x = 34,583.34/255.00
  6. Step 6: Final answer
    x = 135.62

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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.