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Finding the Fourth Proportional to 303,611.40, 455,708.70 and 154,020.60

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Solution

The fourth proportional to 303,611.40, 455,708.70 and 154,020.60 is: 231,178.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,611.40 : 455,708.70 = 154,020.60 : x
  2. Step 2: Convert to fraction form
    303,611.40/455,708.70 = 154,020.60/x
  3. Step 3: Cross multiply
    303,611.40x = 455,708.70 × 154,020.60
  4. Step 4: Simplify right side
    303,611.40x = 70,188,527,399.22
  5. Step 5: Solve for x
    x = 70,188,527,399.22/303,611.40
  6. Step 6: Final answer
    x = 231,178.83

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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.