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Finding the Fourth Proportional to 899.20, 1,241.12 and 550.08

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Solution

The fourth proportional to 899.20, 1,241.12 and 550.08 is: 759.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    899.20 : 1,241.12 = 550.08 : x
  2. Step 2: Convert to fraction form
    899.20/1,241.12 = 550.08/x
  3. Step 3: Cross multiply
    899.20x = 1,241.12 × 550.08
  4. Step 4: Simplify right side
    899.20x = 682,715.29
  5. Step 5: Solve for x
    x = 682,715.29/899.20
  6. Step 6: Final answer
    x = 759.25

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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.