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Finding the Fourth Proportional to 722.28, 995.28 and 669.12

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Solution

The fourth proportional to 722.28, 995.28 and 669.12 is: 922.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    722.28 : 995.28 = 669.12 : x
  2. Step 2: Convert to fraction form
    722.28/995.28 = 669.12/x
  3. Step 3: Cross multiply
    722.28x = 995.28 × 669.12
  4. Step 4: Simplify right side
    722.28x = 665,961.75
  5. Step 5: Solve for x
    x = 665,961.75/722.28
  6. Step 6: Final answer
    x = 922.03

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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.