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Finding the Fourth Proportional to 1,083.64, 1,494.81 and 641.38

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Solution

The fourth proportional to 1,083.64, 1,494.81 and 641.38 is: 884.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,083.64 : 1,494.81 = 641.38 : x
  2. Step 2: Convert to fraction form
    1,083.64/1,494.81 = 641.38/x
  3. Step 3: Cross multiply
    1,083.64x = 1,494.81 × 641.38
  4. Step 4: Simplify right side
    1,083.64x = 958,741.24
  5. Step 5: Solve for x
    x = 958,741.24/1,083.64
  6. Step 6: Final answer
    x = 884.74

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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.