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Finding the Fourth Proportional to 1,102.19, 1,520.82 and 660.33

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Solution

The fourth proportional to 1,102.19, 1,520.82 and 660.33 is: 911.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,102.19 : 1,520.82 = 660.33 : x
  2. Step 2: Convert to fraction form
    1,102.19/1,520.82 = 660.33/x
  3. Step 3: Cross multiply
    1,102.19x = 1,520.82 × 660.33
  4. Step 4: Simplify right side
    1,102.19x = 1,004,243.07
  5. Step 5: Solve for x
    x = 1,004,243.07/1,102.19
  6. Step 6: Final answer
    x = 911.14

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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.