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Finding the Fourth Proportional to 899.27, 1,240.60 and 549.75

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Solution

The fourth proportional to 899.27, 1,240.60 and 549.75 is: 758.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    899.27 : 1,240.60 = 549.75 : x
  2. Step 2: Convert to fraction form
    899.27/1,240.60 = 549.75/x
  3. Step 3: Cross multiply
    899.27x = 1,240.60 × 549.75
  4. Step 4: Simplify right side
    899.27x = 682,019.85
  5. Step 5: Solve for x
    x = 682,019.85/899.27
  6. Step 6: Final answer
    x = 758.41

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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.