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Finding the Fourth Proportional to 891.56, 1,329.36 and 890.34

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Solution

The fourth proportional to 891.56, 1,329.36 and 890.34 is: 1,327.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    891.56 : 1,329.36 = 890.34 : x
  2. Step 2: Convert to fraction form
    891.56/1,329.36 = 890.34/x
  3. Step 3: Cross multiply
    891.56x = 1,329.36 × 890.34
  4. Step 4: Simplify right side
    891.56x = 1,183,582.38
  5. Step 5: Solve for x
    x = 1,183,582.38/891.56
  6. Step 6: Final answer
    x = 1,327.54

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.