Home / 721,716.88-995,961.96-399,427.60

Finding the Fourth Proportional to 721,716.88, 995,961.96 and 399,427.60

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Solution

The fourth proportional to 721,716.88, 995,961.96 and 399,427.60 is: 551,206.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,716.88 : 995,961.96 = 399,427.60 : x
  2. Step 2: Convert to fraction form
    721,716.88/995,961.96 = 399,427.60/x
  3. Step 3: Cross multiply
    721,716.88x = 995,961.96 × 399,427.60
  4. Step 4: Simplify right side
    721,716.88x = 397,814,695,374.10
  5. Step 5: Solve for x
    x = 397,814,695,374.10/721,716.88
  6. Step 6: Final answer
    x = 551,206.03

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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.