Home / 629,173.87-868,449.68-428,086.51

Finding the Fourth Proportional to 629,173.87, 868,449.68 and 428,086.51

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Solution

The fourth proportional to 629,173.87, 868,449.68 and 428,086.51 is: 590,888.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    629,173.87 : 868,449.68 = 428,086.51 : x
  2. Step 2: Convert to fraction form
    629,173.87/868,449.68 = 428,086.51/x
  3. Step 3: Cross multiply
    629,173.87x = 868,449.68 × 428,086.51
  4. Step 4: Simplify right side
    629,173.87x = 371,771,590,481.38
  5. Step 5: Solve for x
    x = 371,771,590,481.38/629,173.87
  6. Step 6: Final answer
    x = 590,888.48

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Double scale
Find fourth proportional to 629,174.87, 868,451.06 and 428,087.51
Similar ratio
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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.