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Finding the Fourth Proportional to 623.62, 860.49 and 343.81

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Solution

The fourth proportional to 623.62, 860.49 and 343.81 is: 474.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.62 : 860.49 = 343.81 : x
  2. Step 2: Convert to fraction form
    623.62/860.49 = 343.81/x
  3. Step 3: Cross multiply
    623.62x = 860.49 × 343.81
  4. Step 4: Simplify right side
    623.62x = 295,846.14
  5. Step 5: Solve for x
    x = 295,846.14/623.62
  6. Step 6: Final answer
    x = 474.40

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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.