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Finding the Fourth Proportional to 519,065.80, 778,598.70 and 515,566.60

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Solution

The fourth proportional to 519,065.80, 778,598.70 and 515,566.60 is: 773,349.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,065.80 : 778,598.70 = 515,566.60 : x
  2. Step 2: Convert to fraction form
    519,065.80/778,598.70 = 515,566.60/x
  3. Step 3: Cross multiply
    519,065.80x = 778,598.70 × 515,566.60
  4. Step 4: Simplify right side
    519,065.80x = 401,419,484,523.42
  5. Step 5: Solve for x
    x = 401,419,484,523.42/519,065.80
  6. Step 6: Final answer
    x = 773,349.90

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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.