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Finding the Fourth Proportional to 899.22, 1,240.69 and 549.86

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Solution

The fourth proportional to 899.22, 1,240.69 and 549.86 is: 758.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    899.22 : 1,240.69 = 549.86 : x
  2. Step 2: Convert to fraction form
    899.22/1,240.69 = 549.86/x
  3. Step 3: Cross multiply
    899.22x = 1,240.69 × 549.86
  4. Step 4: Simplify right side
    899.22x = 682,205.80
  5. Step 5: Solve for x
    x = 682,205.80/899.22
  6. Step 6: Final answer
    x = 758.66

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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.