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Finding the Fourth Proportional to 519,114.90, 778,672.35 and 519,114.90

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Solution

The fourth proportional to 519,114.90, 778,672.35 and 519,114.90 is: 778,672.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,114.90 : 778,672.35 = 519,114.90 : x
  2. Step 2: Convert to fraction form
    519,114.90/778,672.35 = 519,114.90/x
  3. Step 3: Cross multiply
    519,114.90x = 778,672.35 × 519,114.90
  4. Step 4: Simplify right side
    519,114.90x = 404,220,419,103.02
  5. Step 5: Solve for x
    x = 404,220,419,103.02/519,114.90
  6. Step 6: Final answer
    x = 778,672.35

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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.