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Finding the Fourth Proportional to 1,101.10, 1,519.46 and 681.50

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Solution

The fourth proportional to 1,101.10, 1,519.46 and 681.50 is: 940.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,101.10 : 1,519.46 = 681.50 : x
  2. Step 2: Convert to fraction form
    1,101.10/1,519.46 = 681.50/x
  3. Step 3: Cross multiply
    1,101.10x = 1,519.46 × 681.50
  4. Step 4: Simplify right side
    1,101.10x = 1,035,511.99
  5. Step 5: Solve for x
    x = 1,035,511.99/1,101.10
  6. Step 6: Final answer
    x = 940.44

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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.