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Finding the Fourth Proportional to 512.17, 767.56 and 187.22

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Solution

The fourth proportional to 512.17, 767.56 and 187.22 is: 280.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    512.17 : 767.56 = 187.22 : x
  2. Step 2: Convert to fraction form
    512.17/767.56 = 187.22/x
  3. Step 3: Cross multiply
    512.17x = 767.56 × 187.22
  4. Step 4: Simplify right side
    512.17x = 143,702.58
  5. Step 5: Solve for x
    x = 143,702.58/512.17
  6. Step 6: Final answer
    x = 280.58

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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.