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Finding the Fourth Proportional to 1,139.54, 1,708.56 and 481.84

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Solution

The fourth proportional to 1,139.54, 1,708.56 and 481.84 is: 722.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,139.54 : 1,708.56 = 481.84 : x
  2. Step 2: Convert to fraction form
    1,139.54/1,708.56 = 481.84/x
  3. Step 3: Cross multiply
    1,139.54x = 1,708.56 × 481.84
  4. Step 4: Simplify right side
    1,139.54x = 823,252.55
  5. Step 5: Solve for x
    x = 823,252.55/1,139.54
  6. Step 6: Final answer
    x = 722.44

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.