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Finding the Fourth Proportional to 722.28, 995.52 and 660.30

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Solution

The fourth proportional to 722.28, 995.52 and 660.30 is: 910.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    722.28 : 995.52 = 660.30 : x
  2. Step 2: Convert to fraction form
    722.28/995.52 = 660.30/x
  3. Step 3: Cross multiply
    722.28x = 995.52 × 660.30
  4. Step 4: Simplify right side
    722.28x = 657,341.86
  5. Step 5: Solve for x
    x = 657,341.86/722.28
  6. Step 6: Final answer
    x = 910.09

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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.