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Finding the Fourth Proportional to 1,033.94, 1,426.20 and 813.62

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Solution

The fourth proportional to 1,033.94, 1,426.20 and 813.62 is: 1,122.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,033.94 : 1,426.20 = 813.62 : x
  2. Step 2: Convert to fraction form
    1,033.94/1,426.20 = 813.62/x
  3. Step 3: Cross multiply
    1,033.94x = 1,426.20 × 813.62
  4. Step 4: Simplify right side
    1,033.94x = 1,160,384.84
  5. Step 5: Solve for x
    x = 1,160,384.84/1,033.94
  6. Step 6: Final answer
    x = 1,122.29

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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.