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Finding the Fourth Proportional to 512,154.40, 768,231.60 and 485,910.40

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Solution

The fourth proportional to 512,154.40, 768,231.60 and 485,910.40 is: 728,865.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,154.40 : 768,231.60 = 485,910.40 : x
  2. Step 2: Convert to fraction form
    512,154.40/768,231.60 = 485,910.40/x
  3. Step 3: Cross multiply
    512,154.40x = 768,231.60 × 485,910.40
  4. Step 4: Simplify right side
    512,154.40x = 373,291,724,048.64
  5. Step 5: Solve for x
    x = 373,291,724,048.64/512,154.40
  6. Step 6: Final answer
    x = 728,865.60

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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.