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Finding the Fourth Proportional to 619,508.80, 929,263.20 and 408,001.60

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Solution

The fourth proportional to 619,508.80, 929,263.20 and 408,001.60 is: 612,002.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,508.80 : 929,263.20 = 408,001.60 : x
  2. Step 2: Convert to fraction form
    619,508.80/929,263.20 = 408,001.60/x
  3. Step 3: Cross multiply
    619,508.80x = 929,263.20 × 408,001.60
  4. Step 4: Simplify right side
    619,508.80x = 379,140,872,421.12
  5. Step 5: Solve for x
    x = 379,140,872,421.12/619,508.80
  6. Step 6: Final answer
    x = 612,002.40

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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.