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Finding the Fourth Proportional to 610.80, 842.22 and 445.56

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Solution

The fourth proportional to 610.80, 842.22 and 445.56 is: 614.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    610.80 : 842.22 = 445.56 : x
  2. Step 2: Convert to fraction form
    610.80/842.22 = 445.56/x
  3. Step 3: Cross multiply
    610.80x = 842.22 × 445.56
  4. Step 4: Simplify right side
    610.80x = 375,259.54
  5. Step 5: Solve for x
    x = 375,259.54/610.80
  6. Step 6: Final answer
    x = 614.37

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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.