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Finding the Fourth Proportional to 721.17, 995.36 and 472.05

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Solution

The fourth proportional to 721.17, 995.36 and 472.05 is: 651.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    721.17 : 995.36 = 472.05 : x
  2. Step 2: Convert to fraction form
    721.17/995.36 = 472.05/x
  3. Step 3: Cross multiply
    721.17x = 995.36 × 472.05
  4. Step 4: Simplify right side
    721.17x = 469,857.33
  5. Step 5: Solve for x
    x = 469,857.33/721.17
  6. Step 6: Final answer
    x = 651.52

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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.