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Finding the Fourth Proportional to 313,944.80, 470,917.20 and 92,328.80

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Solution

The fourth proportional to 313,944.80, 470,917.20 and 92,328.80 is: 138,493.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,944.80 : 470,917.20 = 92,328.80 : x
  2. Step 2: Convert to fraction form
    313,944.80/470,917.20 = 92,328.80/x
  3. Step 3: Cross multiply
    313,944.80x = 470,917.20 × 92,328.80
  4. Step 4: Simplify right side
    313,944.80x = 43,479,219,975.36
  5. Step 5: Solve for x
    x = 43,479,219,975.36/313,944.80
  6. Step 6: Final answer
    x = 138,493.20

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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.