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Finding the Fourth Proportional to 626.91, 865.17 and 361.39

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Solution

The fourth proportional to 626.91, 865.17 and 361.39 is: 498.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.91 : 865.17 = 361.39 : x
  2. Step 2: Convert to fraction form
    626.91/865.17 = 361.39/x
  3. Step 3: Cross multiply
    626.91x = 865.17 × 361.39
  4. Step 4: Simplify right side
    626.91x = 312,665.81
  5. Step 5: Solve for x
    x = 312,665.81/626.91
  6. Step 6: Final answer
    x = 498.74

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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.