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Finding the Fourth Proportional to 899.37, 1,240.61 and 549.81

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Solution

The fourth proportional to 899.37, 1,240.61 and 549.81 is: 758.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    899.37 : 1,240.61 = 549.81 : x
  2. Step 2: Convert to fraction form
    899.37/1,240.61 = 549.81/x
  3. Step 3: Cross multiply
    899.37x = 1,240.61 × 549.81
  4. Step 4: Simplify right side
    899.37x = 682,094.96
  5. Step 5: Solve for x
    x = 682,094.96/899.37
  6. Step 6: Final answer
    x = 758.42

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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.