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Finding the Fourth Proportional to 519,210.60, 778,815.90 and 487,717.80

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Solution

The fourth proportional to 519,210.60, 778,815.90 and 487,717.80 is: 731,576.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,210.60 : 778,815.90 = 487,717.80 : x
  2. Step 2: Convert to fraction form
    519,210.60/778,815.90 = 487,717.80/x
  3. Step 3: Cross multiply
    519,210.60x = 778,815.90 × 487,717.80
  4. Step 4: Simplify right side
    519,210.60x = 379,842,377,353.02
  5. Step 5: Solve for x
    x = 379,842,377,353.02/519,210.60
  6. Step 6: Final answer
    x = 731,576.70

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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.