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Finding the Fourth Proportional to 857.84, 1,286.77 and 241.55

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Solution

The fourth proportional to 857.84, 1,286.77 and 241.55 is: 362.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    857.84 : 1,286.77 = 241.55 : x
  2. Step 2: Convert to fraction form
    857.84/1,286.77 = 241.55/x
  3. Step 3: Cross multiply
    857.84x = 1,286.77 × 241.55
  4. Step 4: Simplify right side
    857.84x = 310,819.29
  5. Step 5: Solve for x
    x = 310,819.29/857.84
  6. Step 6: Final answer
    x = 362.33

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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.