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Finding the Fourth Proportional to 721.77, 995.49 and 622.37

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Solution

The fourth proportional to 721.77, 995.49 and 622.37 is: 858.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    721.77 : 995.49 = 622.37 : x
  2. Step 2: Convert to fraction form
    721.77/995.49 = 622.37/x
  3. Step 3: Cross multiply
    721.77x = 995.49 × 622.37
  4. Step 4: Simplify right side
    721.77x = 619,558.13
  5. Step 5: Solve for x
    x = 619,558.13/721.77
  6. Step 6: Final answer
    x = 858.39

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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.