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Finding the Fourth Proportional to 1,178.73, 1,627.29 and 806.27

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Solution

The fourth proportional to 1,178.73, 1,627.29 and 806.27 is: 1,113.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,178.73 : 1,627.29 = 806.27 : x
  2. Step 2: Convert to fraction form
    1,178.73/1,627.29 = 806.27/x
  3. Step 3: Cross multiply
    1,178.73x = 1,627.29 × 806.27
  4. Step 4: Simplify right side
    1,178.73x = 1,312,026.97
  5. Step 5: Solve for x
    x = 1,312,026.97/1,178.73
  6. Step 6: Final answer
    x = 1,113.09

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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.