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Finding the Fourth Proportional to 1,328.94, 1,834.09 and 769.41

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Solution

The fourth proportional to 1,328.94, 1,834.09 and 769.41 is: 1,061.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,328.94 : 1,834.09 = 769.41 : x
  2. Step 2: Convert to fraction form
    1,328.94/1,834.09 = 769.41/x
  3. Step 3: Cross multiply
    1,328.94x = 1,834.09 × 769.41
  4. Step 4: Simplify right side
    1,328.94x = 1,411,167.19
  5. Step 5: Solve for x
    x = 1,411,167.19/1,328.94
  6. Step 6: Final answer
    x = 1,061.87

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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.