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Finding the Fourth Proportional to 283,388.14, 391,093.42 and 156,063.74

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Solution

The fourth proportional to 283,388.14, 391,093.42 and 156,063.74 is: 215,377.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,388.14 : 391,093.42 = 156,063.74 : x
  2. Step 2: Convert to fraction form
    283,388.14/391,093.42 = 156,063.74/x
  3. Step 3: Cross multiply
    283,388.14x = 391,093.42 × 156,063.74
  4. Step 4: Simplify right side
    283,388.14x = 61,035,501,814.59
  5. Step 5: Solve for x
    x = 61,035,501,814.59/283,388.14
  6. Step 6: Final answer
    x = 215,377.76

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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.