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Finding the Fourth Proportional to 218,756.40, 327,940.20 and 143,912.40

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Solution

The fourth proportional to 218,756.40, 327,940.20 and 143,912.40 is: 215,740.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,756.40 : 327,940.20 = 143,912.40 : x
  2. Step 2: Convert to fraction form
    218,756.40/327,940.20 = 143,912.40/x
  3. Step 3: Cross multiply
    218,756.40x = 327,940.20 × 143,912.40
  4. Step 4: Simplify right side
    218,756.40x = 47,194,661,238.48
  5. Step 5: Solve for x
    x = 47,194,661,238.48/218,756.40
  6. Step 6: Final answer
    x = 215,740.71

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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.