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Finding the Fourth Proportional to 721,591.93, 995,781.97 and 399,301.84

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Solution

The fourth proportional to 721,591.93, 995,781.97 and 399,301.84 is: 551,028.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,591.93 : 995,781.97 = 399,301.84 : x
  2. Step 2: Convert to fraction form
    721,591.93/995,781.97 = 399,301.84/x
  3. Step 3: Cross multiply
    721,591.93x = 995,781.97 × 399,301.84
  4. Step 4: Simplify right side
    721,591.93x = 397,617,572,859.83
  5. Step 5: Solve for x
    x = 397,617,572,859.83/721,591.93
  6. Step 6: Final answer
    x = 551,028.30

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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.