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Finding the Fourth Proportional to 524,057.85, 786,086.78 and 515,309.85

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Solution

The fourth proportional to 524,057.85, 786,086.78 and 515,309.85 is: 772,964.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    524,057.85 : 786,086.78 = 515,309.85 : x
  2. Step 2: Convert to fraction form
    524,057.85/786,086.78 = 515,309.85/x
  3. Step 3: Cross multiply
    524,057.85x = 786,086.78 × 515,309.85
  4. Step 4: Simplify right side
    524,057.85x = 405,078,258,112.23
  5. Step 5: Solve for x
    x = 405,078,258,112.23/524,057.85
  6. Step 6: Final answer
    x = 772,964.78

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.