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Finding the Fourth Proportional to 313,991.20, 471,015.60 and 103,629.60

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Solution

The fourth proportional to 313,991.20, 471,015.60 and 103,629.60 is: 155,453.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,991.20 : 471,015.60 = 103,629.60 : x
  2. Step 2: Convert to fraction form
    313,991.20/471,015.60 = 103,629.60/x
  3. Step 3: Cross multiply
    313,991.20x = 471,015.60 × 103,629.60
  4. Step 4: Simplify right side
    313,991.20x = 48,811,158,221.76
  5. Step 5: Solve for x
    x = 48,811,158,221.76/313,991.20
  6. Step 6: Final answer
    x = 155,453.91

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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.