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Finding the Fourth Proportional to 1,682.90, 2,322.32 and 936.90

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Solution

The fourth proportional to 1,682.90, 2,322.32 and 936.90 is: 1,292.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,682.90 : 2,322.32 = 936.90 : x
  2. Step 2: Convert to fraction form
    1,682.90/2,322.32 = 936.90/x
  3. Step 3: Cross multiply
    1,682.90x = 2,322.32 × 936.90
  4. Step 4: Simplify right side
    1,682.90x = 2,175,776.92
  5. Step 5: Solve for x
    x = 2,175,776.92/1,682.90
  6. Step 6: Final answer
    x = 1,292.88

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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.