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Finding the Fourth Proportional to 521,521.40, 782,282.10 and 189,054.20

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Solution

The fourth proportional to 521,521.40, 782,282.10 and 189,054.20 is: 283,581.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,521.40 : 782,282.10 = 189,054.20 : x
  2. Step 2: Convert to fraction form
    521,521.40/782,282.10 = 189,054.20/x
  3. Step 3: Cross multiply
    521,521.40x = 782,282.10 × 189,054.20
  4. Step 4: Simplify right side
    521,521.40x = 147,893,716,589.82
  5. Step 5: Solve for x
    x = 147,893,716,589.82/521,521.40
  6. Step 6: Final answer
    x = 283,581.30

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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.