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Finding the Fourth Proportional to 854.73, 1,180.68 and 660.69

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Solution

The fourth proportional to 854.73, 1,180.68 and 660.69 is: 912.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    854.73 : 1,180.68 = 660.69 : x
  2. Step 2: Convert to fraction form
    854.73/1,180.68 = 660.69/x
  3. Step 3: Cross multiply
    854.73x = 1,180.68 × 660.69
  4. Step 4: Simplify right side
    854.73x = 780,063.47
  5. Step 5: Solve for x
    x = 780,063.47/854.73
  6. Step 6: Final answer
    x = 912.64

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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.