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Finding the Fourth Proportional to 486,109.78, 729,164.70 and 153,685.78

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Solution

The fourth proportional to 486,109.78, 729,164.70 and 153,685.78 is: 230,528.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,109.78 : 729,164.70 = 153,685.78 : x
  2. Step 2: Convert to fraction form
    486,109.78/729,164.70 = 153,685.78/x
  3. Step 3: Cross multiply
    486,109.78x = 729,164.70 × 153,685.78
  4. Step 4: Simplify right side
    486,109.78x = 112,062,245,667.97
  5. Step 5: Solve for x
    x = 112,062,245,667.97/486,109.78
  6. Step 6: Final answer
    x = 230,528.68

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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.