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Finding the Fourth Proportional to 393,707.15, 590,654.78 and 127,467.95

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Solution

The fourth proportional to 393,707.15, 590,654.78 and 127,467.95 is: 191,232.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,707.15 : 590,654.78 = 127,467.95 : x
  2. Step 2: Convert to fraction form
    393,707.15/590,654.78 = 127,467.95/x
  3. Step 3: Cross multiply
    393,707.15x = 590,654.78 × 127,467.95
  4. Step 4: Simplify right side
    393,707.15x = 75,289,551,568.70
  5. Step 5: Solve for x
    x = 75,289,551,568.70/393,707.15
  6. Step 6: Final answer
    x = 191,232.37

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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.