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Finding the Fourth Proportional to 610.57, 911.89 and 528.49

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Solution

The fourth proportional to 610.57, 911.89 and 528.49 is: 789.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    610.57 : 911.89 = 528.49 : x
  2. Step 2: Convert to fraction form
    610.57/911.89 = 528.49/x
  3. Step 3: Cross multiply
    610.57x = 911.89 × 528.49
  4. Step 4: Simplify right side
    610.57x = 481,924.75
  5. Step 5: Solve for x
    x = 481,924.75/610.57
  6. Step 6: Final answer
    x = 789.30

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.