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Finding the Fourth Proportional to 718,757.88, 991,941.57 and 396,496.14

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Solution

The fourth proportional to 718,757.88, 991,941.57 and 396,496.14 is: 547,195.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,757.88 : 991,941.57 = 396,496.14 : x
  2. Step 2: Convert to fraction form
    718,757.88/991,941.57 = 396,496.14/x
  3. Step 3: Cross multiply
    718,757.88x = 991,941.57 × 396,496.14
  4. Step 4: Simplify right side
    718,757.88x = 393,301,003,610.54
  5. Step 5: Solve for x
    x = 393,301,003,610.54/718,757.88
  6. Step 6: Final answer
    x = 547,195.40

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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.