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Finding the Fourth Proportional to 521,443.80, 782,165.70 and 166,469.40

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Solution

The fourth proportional to 521,443.80, 782,165.70 and 166,469.40 is: 249,704.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,443.80 : 782,165.70 = 166,469.40 : x
  2. Step 2: Convert to fraction form
    521,443.80/782,165.70 = 166,469.40/x
  3. Step 3: Cross multiply
    521,443.80x = 782,165.70 × 166,469.40
  4. Step 4: Simplify right side
    521,443.80x = 130,206,654,779.58
  5. Step 5: Solve for x
    x = 130,206,654,779.58/521,443.80
  6. Step 6: Final answer
    x = 249,704.10

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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.