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Finding the Fourth Proportional to 891.42, 1,231.04 and 735.60

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Solution

The fourth proportional to 891.42, 1,231.04 and 735.60 is: 1,015.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    891.42 : 1,231.04 = 735.60 : x
  2. Step 2: Convert to fraction form
    891.42/1,231.04 = 735.60/x
  3. Step 3: Cross multiply
    891.42x = 1,231.04 × 735.60
  4. Step 4: Simplify right side
    891.42x = 905,549.35
  5. Step 5: Solve for x
    x = 905,549.35/891.42
  6. Step 6: Final answer
    x = 1,015.85

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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.