Home / 431,721.40-647,387.70-194,942.20

Finding the Fourth Proportional to 431,721.40, 647,387.70 and 194,942.20

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Solution

The fourth proportional to 431,721.40, 647,387.70 and 194,942.20 is: 292,325.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,721.40 : 647,387.70 = 194,942.20 : x
  2. Step 2: Convert to fraction form
    431,721.40/647,387.70 = 194,942.20/x
  3. Step 3: Cross multiply
    431,721.40x = 647,387.70 × 194,942.20
  4. Step 4: Simplify right side
    431,721.40x = 126,203,182,490.94
  5. Step 5: Solve for x
    x = 126,203,182,490.94/431,721.40
  6. Step 6: Final answer
    x = 292,325.52

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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.