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Finding the Fourth Proportional to 425,861.04, 639,234.63 and 313,667.94

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Solution

The fourth proportional to 425,861.04, 639,234.63 and 313,667.94 is: 470,828.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,861.04 : 639,234.63 = 313,667.94 : x
  2. Step 2: Convert to fraction form
    425,861.04/639,234.63 = 313,667.94/x
  3. Step 3: Cross multiply
    425,861.04x = 639,234.63 × 313,667.94
  4. Step 4: Simplify right side
    425,861.04x = 200,507,409,568.76
  5. Step 5: Solve for x
    x = 200,507,409,568.76/425,861.04
  6. Step 6: Final answer
    x = 470,828.25

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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.