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Finding the Fourth Proportional to 890.33, 1,226.12 and 871.25

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Solution

The fourth proportional to 890.33, 1,226.12 and 871.25 is: 1,199.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    890.33 : 1,226.12 = 871.25 : x
  2. Step 2: Convert to fraction form
    890.33/1,226.12 = 871.25/x
  3. Step 3: Cross multiply
    890.33x = 1,226.12 × 871.25
  4. Step 4: Simplify right side
    890.33x = 1,068,246.56
  5. Step 5: Solve for x
    x = 1,068,246.56/890.33
  6. Step 6: Final answer
    x = 1,199.84

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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.