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Finding the Fourth Proportional to 721,080.50, 995,224.20 and 463,279.72

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Solution

The fourth proportional to 721,080.50, 995,224.20 and 463,279.72 is: 639,411.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,080.50 : 995,224.20 = 463,279.72 : x
  2. Step 2: Convert to fraction form
    721,080.50/995,224.20 = 463,279.72/x
  3. Step 3: Cross multiply
    721,080.50x = 995,224.20 × 463,279.72
  4. Step 4: Simplify right side
    721,080.50x = 461,067,188,713.22
  5. Step 5: Solve for x
    x = 461,067,188,713.22/721,080.50
  6. Step 6: Final answer
    x = 639,411.53

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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.