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Finding the Fourth Proportional to 641,643.94, 885,251.73 and 369,704.80

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Solution

The fourth proportional to 641,643.94, 885,251.73 and 369,704.80 is: 510,067.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,643.94 : 885,251.73 = 369,704.80 : x
  2. Step 2: Convert to fraction form
    641,643.94/885,251.73 = 369,704.80/x
  3. Step 3: Cross multiply
    641,643.94x = 885,251.73 × 369,704.80
  4. Step 4: Simplify right side
    641,643.94x = 327,281,813,789.30
  5. Step 5: Solve for x
    x = 327,281,813,789.30/641,643.94
  6. Step 6: Final answer
    x = 510,067.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.