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Finding the Fourth Proportional to 716,505.65, 988,793.11 and 394,216.67

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Solution

The fourth proportional to 716,505.65, 988,793.11 and 394,216.67 is: 544,027.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,505.65 : 988,793.11 = 394,216.67 : x
  2. Step 2: Convert to fraction form
    716,505.65/988,793.11 = 394,216.67/x
  3. Step 3: Cross multiply
    716,505.65x = 988,793.11 × 394,216.67
  4. Step 4: Simplify right side
    716,505.65x = 389,798,720,228.10
  5. Step 5: Solve for x
    x = 389,798,720,228.10/716,505.65
  6. Step 6: Final answer
    x = 544,027.42

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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.