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Finding the Fourth Proportional to 549.29, 755.22 and 489.72

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Solution

The fourth proportional to 549.29, 755.22 and 489.72 is: 673.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    549.29 : 755.22 = 489.72 : x
  2. Step 2: Convert to fraction form
    549.29/755.22 = 489.72/x
  3. Step 3: Cross multiply
    549.29x = 755.22 × 489.72
  4. Step 4: Simplify right side
    549.29x = 369,846.34
  5. Step 5: Solve for x
    x = 369,846.34/549.29
  6. Step 6: Final answer
    x = 673.32

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.