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Finding the Fourth Proportional to 860, 1,186.82 and 519.41

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Solution

The fourth proportional to 860, 1,186.82 and 519.41 is: 716.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    860 : 1,186.82 = 519.41 : x
  2. Step 2: Convert to fraction form
    860/1,186.82 = 519.41/x
  3. Step 3: Cross multiply
    860x = 1,186.82 × 519.41
  4. Step 4: Simplify right side
    860x = 616,446.18
  5. Step 5: Solve for x
    x = 616,446.18/860
  6. Step 6: Final answer
    x = 716.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.