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Finding the Fourth Proportional to 425,765.54, 639,091.18 and 313,572.44

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Solution

The fourth proportional to 425,765.54, 639,091.18 and 313,572.44 is: 470,684.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,765.54 : 639,091.18 = 313,572.44 : x
  2. Step 2: Convert to fraction form
    425,765.54/639,091.18 = 313,572.44/x
  3. Step 3: Cross multiply
    425,765.54x = 639,091.18 × 313,572.44
  4. Step 4: Simplify right side
    425,765.54x = 200,401,380,695.08
  5. Step 5: Solve for x
    x = 200,401,380,695.08/425,765.54
  6. Step 6: Final answer
    x = 470,684.83

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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.