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Finding the Fourth Proportional to 684.27, 1,028.23 and 682.45

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Solution

The fourth proportional to 684.27, 1,028.23 and 682.45 is: 1,025.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    684.27 : 1,028.23 = 682.45 : x
  2. Step 2: Convert to fraction form
    684.27/1,028.23 = 682.45/x
  3. Step 3: Cross multiply
    684.27x = 1,028.23 × 682.45
  4. Step 4: Simplify right side
    684.27x = 701,711.29
  5. Step 5: Solve for x
    x = 701,711.29/684.27
  6. Step 6: Final answer
    x = 1,025.49

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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.