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Finding the Fourth Proportional to 283,765.44, 391,610.80 and 156,440.74

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Solution

The fourth proportional to 283,765.44, 391,610.80 and 156,440.74 is: 215,896.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,765.44 : 391,610.80 = 156,440.74 : x
  2. Step 2: Convert to fraction form
    283,765.44/391,610.80 = 156,440.74/x
  3. Step 3: Cross multiply
    283,765.44x = 391,610.80 × 156,440.74
  4. Step 4: Simplify right side
    283,765.44x = 61,263,883,343.99
  5. Step 5: Solve for x
    x = 61,263,883,343.99/283,765.44
  6. Step 6: Final answer
    x = 215,896.21

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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.