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Finding the Fourth Proportional to 393,914.60, 590,944.80 and 127,683.80

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Solution

The fourth proportional to 393,914.60, 590,944.80 and 127,683.80 is: 191,549.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,914.60 : 590,944.80 = 127,683.80 : x
  2. Step 2: Convert to fraction form
    393,914.60/590,944.80 = 127,683.80/x
  3. Step 3: Cross multiply
    393,914.60x = 590,944.80 × 127,683.80
  4. Step 4: Simplify right side
    393,914.60x = 75,454,077,654.24
  5. Step 5: Solve for x
    x = 75,454,077,654.24/393,914.60
  6. Step 6: Final answer
    x = 191,549.33

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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.