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Finding the Fourth Proportional to 721.60, 995.56 and 441.68

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Solution

The fourth proportional to 721.60, 995.56 and 441.68 is: 609.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    721.60 : 995.56 = 441.68 : x
  2. Step 2: Convert to fraction form
    721.60/995.56 = 441.68/x
  3. Step 3: Cross multiply
    721.60x = 995.56 × 441.68
  4. Step 4: Simplify right side
    721.60x = 439,718.94
  5. Step 5: Solve for x
    x = 439,718.94/721.60
  6. Step 6: Final answer
    x = 609.37

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Double scale
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1.5x scale

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.