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Finding the Fourth Proportional to 889.35, 1,227.29 and 516.39

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Solution

The fourth proportional to 889.35, 1,227.29 and 516.39 is: 712.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    889.35 : 1,227.29 = 516.39 : x
  2. Step 2: Convert to fraction form
    889.35/1,227.29 = 516.39/x
  3. Step 3: Cross multiply
    889.35x = 1,227.29 × 516.39
  4. Step 4: Simplify right side
    889.35x = 633,757.70
  5. Step 5: Solve for x
    x = 633,757.70/889.35
  6. Step 6: Final answer
    x = 712.61

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Double scale
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1.5x scale

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.