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Finding the Fourth Proportional to 1,626.32, 2,441 and 857.36

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Solution

The fourth proportional to 1,626.32, 2,441 and 857.36 is: 1,286.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,626.32 : 2,441 = 857.36 : x
  2. Step 2: Convert to fraction form
    1,626.32/2,441 = 857.36/x
  3. Step 3: Cross multiply
    1,626.32x = 2,441 × 857.36
  4. Step 4: Simplify right side
    1,626.32x = 2,092,815.76
  5. Step 5: Solve for x
    x = 2,092,815.76/1,626.32
  6. Step 6: Final answer
    x = 1,286.84

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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.