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Finding the Fourth Proportional to 283,618.85, 391,388.97 and 154,558.47

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Solution

The fourth proportional to 283,618.85, 391,388.97 and 154,558.47 is: 213,287.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,618.85 : 391,388.97 = 154,558.47 : x
  2. Step 2: Convert to fraction form
    283,618.85/391,388.97 = 154,558.47/x
  3. Step 3: Cross multiply
    283,618.85x = 391,388.97 × 154,558.47
  4. Step 4: Simplify right side
    283,618.85x = 60,492,480,378.08
  5. Step 5: Solve for x
    x = 60,492,480,378.08/283,618.85
  6. Step 6: Final answer
    x = 213,287.94

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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.