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Finding the Fourth Proportional to 619,240.80, 928,861.20 and 304,312.80

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Solution

The fourth proportional to 619,240.80, 928,861.20 and 304,312.80 is: 456,469.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,240.80 : 928,861.20 = 304,312.80 : x
  2. Step 2: Convert to fraction form
    619,240.80/928,861.20 = 304,312.80/x
  3. Step 3: Cross multiply
    619,240.80x = 928,861.20 × 304,312.80
  4. Step 4: Simplify right side
    619,240.80x = 282,664,352,583.36
  5. Step 5: Solve for x
    x = 282,664,352,583.36/619,240.80
  6. Step 6: Final answer
    x = 456,469.20

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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.