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Finding the Fourth Proportional to 623.69, 860.74 and 343.97

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Solution

The fourth proportional to 623.69, 860.74 and 343.97 is: 474.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.69 : 860.74 = 343.97 : x
  2. Step 2: Convert to fraction form
    623.69/860.74 = 343.97/x
  3. Step 3: Cross multiply
    623.69x = 860.74 × 343.97
  4. Step 4: Simplify right side
    623.69x = 296,067.02
  5. Step 5: Solve for x
    x = 296,067.02/623.69
  6. Step 6: Final answer
    x = 474.71

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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.