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Finding the Fourth Proportional to 1,083.71, 1,494.39 and 729.64

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Solution

The fourth proportional to 1,083.71, 1,494.39 and 729.64 is: 1,006.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,083.71 : 1,494.39 = 729.64 : x
  2. Step 2: Convert to fraction form
    1,083.71/1,494.39 = 729.64/x
  3. Step 3: Cross multiply
    1,083.71x = 1,494.39 × 729.64
  4. Step 4: Simplify right side
    1,083.71x = 1,090,362.98
  5. Step 5: Solve for x
    x = 1,090,362.98/1,083.71
  6. Step 6: Final answer
    x = 1,006.14

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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.