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Finding the Fourth Proportional to 1,424.80, 1,965.75 and 834.92

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Solution

The fourth proportional to 1,424.80, 1,965.75 and 834.92 is: 1,151.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,424.80 : 1,965.75 = 834.92 : x
  2. Step 2: Convert to fraction form
    1,424.80/1,965.75 = 834.92/x
  3. Step 3: Cross multiply
    1,424.80x = 1,965.75 × 834.92
  4. Step 4: Simplify right side
    1,424.80x = 1,641,234.16
  5. Step 5: Solve for x
    x = 1,641,234.16/1,424.80
  6. Step 6: Final answer
    x = 1,151.91

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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.