Home / 521,519.40-782,279.10-189,052.20

Finding the Fourth Proportional to 521,519.40, 782,279.10 and 189,052.20

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Solution

The fourth proportional to 521,519.40, 782,279.10 and 189,052.20 is: 283,578.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,519.40 : 782,279.10 = 189,052.20 : x
  2. Step 2: Convert to fraction form
    521,519.40/782,279.10 = 189,052.20/x
  3. Step 3: Cross multiply
    521,519.40x = 782,279.10 × 189,052.20
  4. Step 4: Simplify right side
    521,519.40x = 147,891,584,869.02
  5. Step 5: Solve for x
    x = 147,891,584,869.02/521,519.40
  6. Step 6: Final answer
    x = 283,578.30

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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.