Home / 721,700.82-995,933.34-399,411.09

Finding the Fourth Proportional to 721,700.82, 995,933.34 and 399,411.09

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Solution

The fourth proportional to 721,700.82, 995,933.34 and 399,411.09 is: 551,179.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,700.82 : 995,933.34 = 399,411.09 : x
  2. Step 2: Convert to fraction form
    721,700.82/995,933.34 = 399,411.09/x
  3. Step 3: Cross multiply
    721,700.82x = 995,933.34 × 399,411.09
  4. Step 4: Simplify right side
    721,700.82x = 397,786,820,896.74
  5. Step 5: Solve for x
    x = 397,786,820,896.74/721,700.82
  6. Step 6: Final answer
    x = 551,179.67

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Double scale
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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.