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Finding the Fourth Proportional to 721.96, 995.95 and 423.01

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Solution

The fourth proportional to 721.96, 995.95 and 423.01 is: 583.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    721.96 : 995.95 = 423.01 : x
  2. Step 2: Convert to fraction form
    721.96/995.95 = 423.01/x
  3. Step 3: Cross multiply
    721.96x = 995.95 × 423.01
  4. Step 4: Simplify right side
    721.96x = 421,290.60
  5. Step 5: Solve for x
    x = 421,290.60/721.96
  6. Step 6: Final answer
    x = 583.53

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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.