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Finding the Fourth Proportional to 619,137.45, 928,706.37 and 408,726.18

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Solution

The fourth proportional to 619,137.45, 928,706.37 and 408,726.18 is: 613,089.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,137.45 : 928,706.37 = 408,726.18 : x
  2. Step 2: Convert to fraction form
    619,137.45/928,706.37 = 408,726.18/x
  3. Step 3: Cross multiply
    619,137.45x = 928,706.37 × 408,726.18
  4. Step 4: Simplify right side
    619,137.45x = 379,586,606,951.77
  5. Step 5: Solve for x
    x = 379,586,606,951.77/619,137.45
  6. Step 6: Final answer
    x = 613,089.40

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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.