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Finding the Fourth Proportional to 512,363.70, 768,545.55 and 505,365.30

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Solution

The fourth proportional to 512,363.70, 768,545.55 and 505,365.30 is: 758,047.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,363.70 : 768,545.55 = 505,365.30 : x
  2. Step 2: Convert to fraction form
    512,363.70/768,545.55 = 505,365.30/x
  3. Step 3: Cross multiply
    512,363.70x = 768,545.55 × 505,365.30
  4. Step 4: Simplify right side
    512,363.70x = 388,396,252,439.42
  5. Step 5: Solve for x
    x = 388,396,252,439.42/512,363.70
  6. Step 6: Final answer
    x = 758,047.95

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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.