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Finding the Fourth Proportional to 1,083.06, 1,494.52 and 640.90

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Solution

The fourth proportional to 1,083.06, 1,494.52 and 640.90 is: 884.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,083.06 : 1,494.52 = 640.90 : x
  2. Step 2: Convert to fraction form
    1,083.06/1,494.52 = 640.90/x
  3. Step 3: Cross multiply
    1,083.06x = 1,494.52 × 640.90
  4. Step 4: Simplify right side
    1,083.06x = 957,838.13
  5. Step 5: Solve for x
    x = 957,838.13/1,083.06
  6. Step 6: Final answer
    x = 884.38

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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.