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Finding the Fourth Proportional to 889.92, 1,228.19 and 516.92

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Solution

The fourth proportional to 889.92, 1,228.19 and 516.92 is: 713.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    889.92 : 1,228.19 = 516.92 : x
  2. Step 2: Convert to fraction form
    889.92/1,228.19 = 516.92/x
  3. Step 3: Cross multiply
    889.92x = 1,228.19 × 516.92
  4. Step 4: Simplify right side
    889.92x = 634,867.25
  5. Step 5: Solve for x
    x = 634,867.25/889.92
  6. Step 6: Final answer
    x = 713.40

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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.