Home / 721,628.64-995,849.46-399,360.96

Finding the Fourth Proportional to 721,628.64, 995,849.46 and 399,360.96

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Solution

The fourth proportional to 721,628.64, 995,849.46 and 399,360.96 is: 551,119.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,628.64 : 995,849.46 = 399,360.96 : x
  2. Step 2: Convert to fraction form
    721,628.64/995,849.46 = 399,360.96/x
  3. Step 3: Cross multiply
    721,628.64x = 995,849.46 × 399,360.96
  4. Step 4: Simplify right side
    721,628.64x = 397,703,396,361.08
  5. Step 5: Solve for x
    x = 397,703,396,361.08/721,628.64
  6. Step 6: Final answer
    x = 551,119.20

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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.