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Finding the Fourth Proportional to 995.04, 1,372.86 and 679.68

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Solution

The fourth proportional to 995.04, 1,372.86 and 679.68 is: 937.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    995.04 : 1,372.86 = 679.68 : x
  2. Step 2: Convert to fraction form
    995.04/1,372.86 = 679.68/x
  3. Step 3: Cross multiply
    995.04x = 1,372.86 × 679.68
  4. Step 4: Simplify right side
    995.04x = 933,105.48
  5. Step 5: Solve for x
    x = 933,105.48/995.04
  6. Step 6: Final answer
    x = 937.76

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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.