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Finding the Fourth Proportional to 1,889.35, 2,833.68 and 640.01

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Solution

The fourth proportional to 1,889.35, 2,833.68 and 640.01 is: 959.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,889.35 : 2,833.68 = 640.01 : x
  2. Step 2: Convert to fraction form
    1,889.35/2,833.68 = 640.01/x
  3. Step 3: Cross multiply
    1,889.35x = 2,833.68 × 640.01
  4. Step 4: Simplify right side
    1,889.35x = 1,813,583.54
  5. Step 5: Solve for x
    x = 1,813,583.54/1,889.35
  6. Step 6: Final answer
    x = 959.90

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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.