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Finding the Fourth Proportional to 843.72, 1,164.14 and 512.12

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Solution

The fourth proportional to 843.72, 1,164.14 and 512.12 is: 706.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    843.72 : 1,164.14 = 512.12 : x
  2. Step 2: Convert to fraction form
    843.72/1,164.14 = 512.12/x
  3. Step 3: Cross multiply
    843.72x = 1,164.14 × 512.12
  4. Step 4: Simplify right side
    843.72x = 596,179.38
  5. Step 5: Solve for x
    x = 596,179.38/843.72
  6. Step 6: Final answer
    x = 706.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.