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Finding the Fourth Proportional to 511.63, 767.44 and 126.88

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Solution

The fourth proportional to 511.63, 767.44 and 126.88 is: 190.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    511.63 : 767.44 = 126.88 : x
  2. Step 2: Convert to fraction form
    511.63/767.44 = 126.88/x
  3. Step 3: Cross multiply
    511.63x = 767.44 × 126.88
  4. Step 4: Simplify right side
    511.63x = 97,372.79
  5. Step 5: Solve for x
    x = 97,372.79/511.63
  6. Step 6: Final answer
    x = 190.32

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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.