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Finding the Fourth Proportional to 843.24, 1,265.19 and 356.64

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Solution

The fourth proportional to 843.24, 1,265.19 and 356.64 is: 535.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    843.24 : 1,265.19 = 356.64 : x
  2. Step 2: Convert to fraction form
    843.24/1,265.19 = 356.64/x
  3. Step 3: Cross multiply
    843.24x = 1,265.19 × 356.64
  4. Step 4: Simplify right side
    843.24x = 451,217.36
  5. Step 5: Solve for x
    x = 451,217.36/843.24
  6. Step 6: Final answer
    x = 535.10

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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.