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Finding the Fourth Proportional to 829.24, 1,144.50 and 518.56

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Solution

The fourth proportional to 829.24, 1,144.50 and 518.56 is: 715.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    829.24 : 1,144.50 = 518.56 : x
  2. Step 2: Convert to fraction form
    829.24/1,144.50 = 518.56/x
  3. Step 3: Cross multiply
    829.24x = 1,144.50 × 518.56
  4. Step 4: Simplify right side
    829.24x = 593,491.92
  5. Step 5: Solve for x
    x = 593,491.92/829.24
  6. Step 6: Final answer
    x = 715.71

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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.