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Finding the Fourth Proportional to 283,728.87, 391,538.46 and 154,669.91

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Solution

The fourth proportional to 283,728.87, 391,538.46 and 154,669.91 is: 213,440.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,728.87 : 391,538.46 = 154,669.91 : x
  2. Step 2: Convert to fraction form
    283,728.87/391,538.46 = 154,669.91/x
  3. Step 3: Cross multiply
    283,728.87x = 391,538.46 × 154,669.91
  4. Step 4: Simplify right side
    283,728.87x = 60,559,216,412.05
  5. Step 5: Solve for x
    x = 60,559,216,412.05/283,728.87
  6. Step 6: Final answer
    x = 213,440.45

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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.