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Finding the Fourth Proportional to 829.29, 1,143.53 and 549.44

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Solution

The fourth proportional to 829.29, 1,143.53 and 549.44 is: 757.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    829.29 : 1,143.53 = 549.44 : x
  2. Step 2: Convert to fraction form
    829.29/1,143.53 = 549.44/x
  3. Step 3: Cross multiply
    829.29x = 1,143.53 × 549.44
  4. Step 4: Simplify right side
    829.29x = 628,295.41
  5. Step 5: Solve for x
    x = 628,295.41/829.29
  6. Step 6: Final answer
    x = 757.63

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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.