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Finding the Fourth Proportional to 519,885.10, 779,827.65 and 253,816.30

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Solution

The fourth proportional to 519,885.10, 779,827.65 and 253,816.30 is: 380,724.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,885.10 : 779,827.65 = 253,816.30 : x
  2. Step 2: Convert to fraction form
    519,885.10/779,827.65 = 253,816.30/x
  3. Step 3: Cross multiply
    519,885.10x = 779,827.65 × 253,816.30
  4. Step 4: Simplify right side
    519,885.10x = 197,932,968,760.70
  5. Step 5: Solve for x
    x = 197,932,968,760.70/519,885.10
  6. Step 6: Final answer
    x = 380,724.45

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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.