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Finding the Fourth Proportional to 721,536.75, 995,652.89 and 488,489.60

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Solution

The fourth proportional to 721,536.75, 995,652.89 and 488,489.60 is: 674,069.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,536.75 : 995,652.89 = 488,489.60 : x
  2. Step 2: Convert to fraction form
    721,536.75/995,652.89 = 488,489.60/x
  3. Step 3: Cross multiply
    721,536.75x = 995,652.89 × 488,489.60
  4. Step 4: Simplify right side
    721,536.75x = 486,366,081,974.94
  5. Step 5: Solve for x
    x = 486,366,081,974.94/721,536.75
  6. Step 6: Final answer
    x = 674,069.73

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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.