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Finding the Fourth Proportional to 995.29, 1,372.28 and 860.45

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Solution

The fourth proportional to 995.29, 1,372.28 and 860.45 is: 1,186.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    995.29 : 1,372.28 = 860.45 : x
  2. Step 2: Convert to fraction form
    995.29/1,372.28 = 860.45/x
  3. Step 3: Cross multiply
    995.29x = 1,372.28 × 860.45
  4. Step 4: Simplify right side
    995.29x = 1,180,778.33
  5. Step 5: Solve for x
    x = 1,180,778.33/995.29
  6. Step 6: Final answer
    x = 1,186.37

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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.