Home / 839,185.92-1,259,089.92-390,147.84

Finding the Fourth Proportional to 839,185.92, 1,259,089.92 and 390,147.84

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Solution

The fourth proportional to 839,185.92, 1,259,089.92 and 390,147.84 is: 585,366.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    839,185.92 : 1,259,089.92 = 390,147.84 : x
  2. Step 2: Convert to fraction form
    839,185.92/1,259,089.92 = 390,147.84/x
  3. Step 3: Cross multiply
    839,185.92x = 1,259,089.92 × 390,147.84
  4. Step 4: Simplify right side
    839,185.92x = 491,231,212,653.77
  5. Step 5: Solve for x
    x = 491,231,212,653.77/839,185.92
  6. Step 6: Final answer
    x = 585,366.37

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.