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Finding the Fourth Proportional to 519,890.80, 779,836.20 and 348,648.70

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Solution

The fourth proportional to 519,890.80, 779,836.20 and 348,648.70 is: 522,973.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,890.80 : 779,836.20 = 348,648.70 : x
  2. Step 2: Convert to fraction form
    519,890.80/779,836.20 = 348,648.70/x
  3. Step 3: Cross multiply
    519,890.80x = 779,836.20 × 348,648.70
  4. Step 4: Simplify right side
    519,890.80x = 271,888,877,342.94
  5. Step 5: Solve for x
    x = 271,888,877,342.94/519,890.80
  6. Step 6: Final answer
    x = 522,973.05

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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.