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Finding the Fourth Proportional to 486,117.78, 729,176.70 and 153,693.78

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Solution

The fourth proportional to 486,117.78, 729,176.70 and 153,693.78 is: 230,540.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,117.78 : 729,176.70 = 153,693.78 : x
  2. Step 2: Convert to fraction form
    486,117.78/729,176.70 = 153,693.78/x
  3. Step 3: Cross multiply
    486,117.78x = 729,176.70 × 153,693.78
  4. Step 4: Simplify right side
    486,117.78x = 112,069,923,310.93
  5. Step 5: Solve for x
    x = 112,069,923,310.93/486,117.78
  6. Step 6: Final answer
    x = 230,540.68

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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.