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Finding the Fourth Proportional to 995.63, 1,373.96 and 871.70

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Solution

The fourth proportional to 995.63, 1,373.96 and 871.70 is: 1,202.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    995.63 : 1,373.96 = 871.70 : x
  2. Step 2: Convert to fraction form
    995.63/1,373.96 = 871.70/x
  3. Step 3: Cross multiply
    995.63x = 1,373.96 × 871.70
  4. Step 4: Simplify right side
    995.63x = 1,197,676.24
  5. Step 5: Solve for x
    x = 1,197,676.24/995.63
  6. Step 6: Final answer
    x = 1,202.94

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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.