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Finding the Fourth Proportional to 1,423.11, 1,963.42 and 833.43

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Solution

The fourth proportional to 1,423.11, 1,963.42 and 833.43 is: 1,149.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,423.11 : 1,963.42 = 833.43 : x
  2. Step 2: Convert to fraction form
    1,423.11/1,963.42 = 833.43/x
  3. Step 3: Cross multiply
    1,423.11x = 1,963.42 × 833.43
  4. Step 4: Simplify right side
    1,423.11x = 1,636,373.13
  5. Step 5: Solve for x
    x = 1,636,373.13/1,423.11
  6. Step 6: Final answer
    x = 1,149.86

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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.