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Finding the Fourth Proportional to 653,240.40, 979,860.60 and 279,301.20

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Solution

The fourth proportional to 653,240.40, 979,860.60 and 279,301.20 is: 418,951.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    653,240.40 : 979,860.60 = 279,301.20 : x
  2. Step 2: Convert to fraction form
    653,240.40/979,860.60 = 279,301.20/x
  3. Step 3: Cross multiply
    653,240.40x = 979,860.60 × 279,301.20
  4. Step 4: Simplify right side
    653,240.40x = 273,676,241,412.72
  5. Step 5: Solve for x
    x = 273,676,241,412.72/653,240.40
  6. Step 6: Final answer
    x = 418,951.80

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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.