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Finding the Fourth Proportional to 461.06, 690.27 and 431.97

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Solution

The fourth proportional to 461.06, 690.27 and 431.97 is: 646.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    461.06 : 690.27 = 431.97 : x
  2. Step 2: Convert to fraction form
    461.06/690.27 = 431.97/x
  3. Step 3: Cross multiply
    461.06x = 690.27 × 431.97
  4. Step 4: Simplify right side
    461.06x = 298,171.72
  5. Step 5: Solve for x
    x = 298,171.72/461.06
  6. Step 6: Final answer
    x = 646.71

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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.