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Finding the Fourth Proportional to 393,721.30, 590,676.04 and 127,482.12

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Solution

The fourth proportional to 393,721.30, 590,676.04 and 127,482.12 is: 191,253.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,721.30 : 590,676.04 = 127,482.12 : x
  2. Step 2: Convert to fraction form
    393,721.30/590,676.04 = 127,482.12/x
  3. Step 3: Cross multiply
    393,721.30x = 590,676.04 × 127,482.12
  4. Step 4: Simplify right side
    393,721.30x = 75,300,633,812.40
  5. Step 5: Solve for x
    x = 75,300,633,812.40/393,721.30
  6. Step 6: Final answer
    x = 191,253.65

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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.