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Finding the Fourth Proportional to 843.55, 1,265.29 and 266.42

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Solution

The fourth proportional to 843.55, 1,265.29 and 266.42 is: 399.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    843.55 : 1,265.29 = 266.42 : x
  2. Step 2: Convert to fraction form
    843.55/1,265.29 = 266.42/x
  3. Step 3: Cross multiply
    843.55x = 1,265.29 × 266.42
  4. Step 4: Simplify right side
    843.55x = 337,101.06
  5. Step 5: Solve for x
    x = 337,101.06/843.55
  6. Step 6: Final answer
    x = 399.62

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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.