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Finding the Fourth Proportional to 843.44, 1,265.41 and 432.87

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Solution

The fourth proportional to 843.44, 1,265.41 and 432.87 is: 649.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    843.44 : 1,265.41 = 432.87 : x
  2. Step 2: Convert to fraction form
    843.44/1,265.41 = 432.87/x
  3. Step 3: Cross multiply
    843.44x = 1,265.41 × 432.87
  4. Step 4: Simplify right side
    843.44x = 547,758.03
  5. Step 5: Solve for x
    x = 547,758.03/843.44
  6. Step 6: Final answer
    x = 649.43

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1.5x scale

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.