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Finding the Fourth Proportional to 461,082.40, 691,623.60 and 128,658.40

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Solution

The fourth proportional to 461,082.40, 691,623.60 and 128,658.40 is: 192,987.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    461,082.40 : 691,623.60 = 128,658.40 : x
  2. Step 2: Convert to fraction form
    461,082.40/691,623.60 = 128,658.40/x
  3. Step 3: Cross multiply
    461,082.40x = 691,623.60 × 128,658.40
  4. Step 4: Simplify right side
    461,082.40x = 88,983,185,778.24
  5. Step 5: Solve for x
    x = 88,983,185,778.24/461,082.40
  6. Step 6: Final answer
    x = 192,987.60

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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.