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Finding the Fourth Proportional to 283,639.01, 391,416.57 and 154,578.51

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Solution

The fourth proportional to 283,639.01, 391,416.57 and 154,578.51 is: 213,315.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,639.01 : 391,416.57 = 154,578.51 : x
  2. Step 2: Convert to fraction form
    283,639.01/391,416.57 = 154,578.51/x
  3. Step 3: Cross multiply
    283,639.01x = 391,416.57 × 154,578.51
  4. Step 4: Simplify right side
    283,639.01x = 60,504,590,179.91
  5. Step 5: Solve for x
    x = 60,504,590,179.91/283,639.01
  6. Step 6: Final answer
    x = 213,315.48

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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.