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Finding the Fourth Proportional to 899.19, 1,240.92 and 549.81

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Solution

The fourth proportional to 899.19, 1,240.92 and 549.81 is: 758.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    899.19 : 1,240.92 = 549.81 : x
  2. Step 2: Convert to fraction form
    899.19/1,240.92 = 549.81/x
  3. Step 3: Cross multiply
    899.19x = 1,240.92 × 549.81
  4. Step 4: Simplify right side
    899.19x = 682,270.23
  5. Step 5: Solve for x
    x = 682,270.23/899.19
  6. Step 6: Final answer
    x = 758.76

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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.