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Finding the Fourth Proportional to 393,721.38, 590,675.94 and 127,482

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Solution

The fourth proportional to 393,721.38, 590,675.94 and 127,482 is: 191,253.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,721.38 : 590,675.94 = 127,482 : x
  2. Step 2: Convert to fraction form
    393,721.38/590,675.94 = 127,482/x
  3. Step 3: Cross multiply
    393,721.38x = 590,675.94 × 127,482
  4. Step 4: Simplify right side
    393,721.38x = 75,300,550,183.08
  5. Step 5: Solve for x
    x = 75,300,550,183.08/393,721.38
  6. Step 6: Final answer
    x = 191,253.39

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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.