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Finding the Fourth Proportional to 549.45, 757.89 and 438.75

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Solution

The fourth proportional to 549.45, 757.89 and 438.75 is: 605.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    549.45 : 757.89 = 438.75 : x
  2. Step 2: Convert to fraction form
    549.45/757.89 = 438.75/x
  3. Step 3: Cross multiply
    549.45x = 757.89 × 438.75
  4. Step 4: Simplify right side
    549.45x = 332,524.24
  5. Step 5: Solve for x
    x = 332,524.24/549.45
  6. Step 6: Final answer
    x = 605.19

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.