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Finding the Fourth Proportional to 425,778.54, 639,110.75 and 313,585.44

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Solution

The fourth proportional to 425,778.54, 639,110.75 and 313,585.44 is: 470,704.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,778.54 : 639,110.75 = 313,585.44 : x
  2. Step 2: Convert to fraction form
    425,778.54/639,110.75 = 313,585.44/x
  3. Step 3: Cross multiply
    425,778.54x = 639,110.75 × 313,585.44
  4. Step 4: Simplify right side
    425,778.54x = 200,415,824,179.55
  5. Step 5: Solve for x
    x = 200,415,824,179.55/425,778.54
  6. Step 6: Final answer
    x = 470,704.38

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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.