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Finding the Fourth Proportional to 393,708.93, 590,657.45 and 127,469.72

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Solution

The fourth proportional to 393,708.93, 590,657.45 and 127,469.72 is: 191,235.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,708.93 : 590,657.45 = 127,469.72 : x
  2. Step 2: Convert to fraction form
    393,708.93/590,657.45 = 127,469.72/x
  3. Step 3: Cross multiply
    393,708.93x = 590,657.45 × 127,469.72
  4. Step 4: Simplify right side
    393,708.93x = 75,290,936,176.78
  5. Step 5: Solve for x
    x = 75,290,936,176.78/393,708.93
  6. Step 6: Final answer
    x = 191,235.02

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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.