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Finding the Fourth Proportional to 521,384.80, 782,077.20 and 166,410.40

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Solution

The fourth proportional to 521,384.80, 782,077.20 and 166,410.40 is: 249,615.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,384.80 : 782,077.20 = 166,410.40 : x
  2. Step 2: Convert to fraction form
    521,384.80/782,077.20 = 166,410.40/x
  3. Step 3: Cross multiply
    521,384.80x = 782,077.20 × 166,410.40
  4. Step 4: Simplify right side
    521,384.80x = 130,145,779,682.88
  5. Step 5: Solve for x
    x = 130,145,779,682.88/521,384.80
  6. Step 6: Final answer
    x = 249,615.60

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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.