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Finding the Fourth Proportional to 642,151.44, 963,290.52 and 221,371.92

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Solution

The fourth proportional to 642,151.44, 963,290.52 and 221,371.92 is: 332,079.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,151.44 : 963,290.52 = 221,371.92 : x
  2. Step 2: Convert to fraction form
    642,151.44/963,290.52 = 221,371.92/x
  3. Step 3: Cross multiply
    642,151.44x = 963,290.52 × 221,371.92
  4. Step 4: Simplify right side
    642,151.44x = 213,245,471,930.20
  5. Step 5: Solve for x
    x = 213,245,471,930.20/642,151.44
  6. Step 6: Final answer
    x = 332,079.72

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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.