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Finding the Fourth Proportional to 1,424,491.92, 1,965,724.20 and 779,788.62

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Solution

The fourth proportional to 1,424,491.92, 1,965,724.20 and 779,788.62 is: 1,076,067.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,424,491.92 : 1,965,724.20 = 779,788.62 : x
  2. Step 2: Convert to fraction form
    1,424,491.92/1,965,724.20 = 779,788.62/x
  3. Step 3: Cross multiply
    1,424,491.92x = 1,965,724.20 × 779,788.62
  4. Step 4: Simplify right side
    1,424,491.92x = 1,532,849,361,218.60
  5. Step 5: Solve for x
    x = 1,532,849,361,218.60/1,424,491.92
  6. Step 6: Final answer
    x = 1,076,067.43

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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.