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Finding the Fourth Proportional to 889.43, 1,227.54 and 516.53

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Solution

The fourth proportional to 889.43, 1,227.54 and 516.53 is: 712.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    889.43 : 1,227.54 = 516.53 : x
  2. Step 2: Convert to fraction form
    889.43/1,227.54 = 516.53/x
  3. Step 3: Cross multiply
    889.43x = 1,227.54 × 516.53
  4. Step 4: Simplify right side
    889.43x = 634,055.10
  5. Step 5: Solve for x
    x = 634,055.10/889.43
  6. Step 6: Final answer
    x = 712.88

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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.