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Finding the Fourth Proportional to 1,096.56, 1,645.55 and 438.33

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Solution

The fourth proportional to 1,096.56, 1,645.55 and 438.33 is: 657.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,096.56 : 1,645.55 = 438.33 : x
  2. Step 2: Convert to fraction form
    1,096.56/1,645.55 = 438.33/x
  3. Step 3: Cross multiply
    1,096.56x = 1,645.55 × 438.33
  4. Step 4: Simplify right side
    1,096.56x = 721,293.93
  5. Step 5: Solve for x
    x = 721,293.93/1,096.56
  6. Step 6: Final answer
    x = 657.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.