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Finding the Fourth Proportional to 313,935.60, 470,212.20 and 278,914.80

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Solution

The fourth proportional to 313,935.60, 470,212.20 and 278,914.80 is: 417,758.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,935.60 : 470,212.20 = 278,914.80 : x
  2. Step 2: Convert to fraction form
    313,935.60/470,212.20 = 278,914.80/x
  3. Step 3: Cross multiply
    313,935.60x = 470,212.20 × 278,914.80
  4. Step 4: Simplify right side
    313,935.60x = 131,149,141,720.56
  5. Step 5: Solve for x
    x = 131,149,141,720.56/313,935.60
  6. Step 6: Final answer
    x = 417,758.11

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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.