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Finding the Fourth Proportional to 255.91, 383.89 and 126.06

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Solution

The fourth proportional to 255.91, 383.89 and 126.06 is: 189.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    255.91 : 383.89 = 126.06 : x
  2. Step 2: Convert to fraction form
    255.91/383.89 = 126.06/x
  3. Step 3: Cross multiply
    255.91x = 383.89 × 126.06
  4. Step 4: Simplify right side
    255.91x = 48,391.66
  5. Step 5: Solve for x
    x = 48,391.66/255.91
  6. Step 6: Final answer
    x = 189.10

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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.