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Finding the Fourth Proportional to 619,117.20, 928,675.86 and 408,705.93

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Solution

The fourth proportional to 619,117.20, 928,675.86 and 408,705.93 is: 613,058.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,117.20 : 928,675.86 = 408,705.93 : x
  2. Step 2: Convert to fraction form
    619,117.20/928,675.86 = 408,705.93/x
  3. Step 3: Cross multiply
    619,117.20x = 928,675.86 × 408,705.93
  4. Step 4: Simplify right side
    619,117.20x = 379,555,331,029.85
  5. Step 5: Solve for x
    x = 379,555,331,029.85/619,117.20
  6. Step 6: Final answer
    x = 613,058.93

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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.