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Finding the Fourth Proportional to 283,640.84, 391,419.34 and 154,580.50

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Solution

The fourth proportional to 283,640.84, 391,419.34 and 154,580.50 is: 213,318.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,640.84 : 391,419.34 = 154,580.50 : x
  2. Step 2: Convert to fraction form
    283,640.84/391,419.34 = 154,580.50/x
  3. Step 3: Cross multiply
    283,640.84x = 391,419.34 × 154,580.50
  4. Step 4: Simplify right side
    283,640.84x = 60,505,797,389.69
  5. Step 5: Solve for x
    x = 60,505,797,389.69/283,640.84
  6. Step 6: Final answer
    x = 213,318.36

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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.