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Finding the Fourth Proportional to 995.22, 1,491.36 and 669.42

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Solution

The fourth proportional to 995.22, 1,491.36 and 669.42 is: 1,003.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    995.22 : 1,491.36 = 669.42 : x
  2. Step 2: Convert to fraction form
    995.22/1,491.36 = 669.42/x
  3. Step 3: Cross multiply
    995.22x = 1,491.36 × 669.42
  4. Step 4: Simplify right side
    995.22x = 998,346.21
  5. Step 5: Solve for x
    x = 998,346.21/995.22
  6. Step 6: Final answer
    x = 1,003.14

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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.