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Finding the Fourth Proportional to 623.05, 859.79 and 343.28

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Solution

The fourth proportional to 623.05, 859.79 and 343.28 is: 473.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.05 : 859.79 = 343.28 : x
  2. Step 2: Convert to fraction form
    623.05/859.79 = 343.28/x
  3. Step 3: Cross multiply
    623.05x = 859.79 × 343.28
  4. Step 4: Simplify right side
    623.05x = 295,145.27
  5. Step 5: Solve for x
    x = 295,145.27/623.05
  6. Step 6: Final answer
    x = 473.71

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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.