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Finding the Fourth Proportional to 1,083.02, 1,494.50 and 640.84

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Solution

The fourth proportional to 1,083.02, 1,494.50 and 640.84 is: 884.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,083.02 : 1,494.50 = 640.84 : x
  2. Step 2: Convert to fraction form
    1,083.02/1,494.50 = 640.84/x
  3. Step 3: Cross multiply
    1,083.02x = 1,494.50 × 640.84
  4. Step 4: Simplify right side
    1,083.02x = 957,735.38
  5. Step 5: Solve for x
    x = 957,735.38/1,083.02
  6. Step 6: Final answer
    x = 884.32

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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.