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Finding the Fourth Proportional to 969.46, 1,338.33 and 660.58

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Solution

The fourth proportional to 969.46, 1,338.33 and 660.58 is: 911.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    969.46 : 1,338.33 = 660.58 : x
  2. Step 2: Convert to fraction form
    969.46/1,338.33 = 660.58/x
  3. Step 3: Cross multiply
    969.46x = 1,338.33 × 660.58
  4. Step 4: Simplify right side
    969.46x = 884,074.03
  5. Step 5: Solve for x
    x = 884,074.03/969.46
  6. Step 6: Final answer
    x = 911.92

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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.