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Finding the Fourth Proportional to 1,406.97, 2,109.70 and 996.91

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Solution

The fourth proportional to 1,406.97, 2,109.70 and 996.91 is: 1,494.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,406.97 : 2,109.70 = 996.91 : x
  2. Step 2: Convert to fraction form
    1,406.97/2,109.70 = 996.91/x
  3. Step 3: Cross multiply
    1,406.97x = 2,109.70 × 996.91
  4. Step 4: Simplify right side
    1,406.97x = 2,103,171.39
  5. Step 5: Solve for x
    x = 2,103,171.39/1,406.97
  6. Step 6: Final answer
    x = 1,494.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.