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Finding the Fourth Proportional to 855.45, 1,282.97 and 335.43

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Solution

The fourth proportional to 855.45, 1,282.97 and 335.43 is: 503.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    855.45 : 1,282.97 = 335.43 : x
  2. Step 2: Convert to fraction form
    855.45/1,282.97 = 335.43/x
  3. Step 3: Cross multiply
    855.45x = 1,282.97 × 335.43
  4. Step 4: Simplify right side
    855.45x = 430,347.47
  5. Step 5: Solve for x
    x = 430,347.47/855.45
  6. Step 6: Final answer
    x = 503.07

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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.