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Finding the Fourth Proportional to 892.05, 1,336.90 and 775.95

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Solution

The fourth proportional to 892.05, 1,336.90 and 775.95 is: 1,162.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    892.05 : 1,336.90 = 775.95 : x
  2. Step 2: Convert to fraction form
    892.05/1,336.90 = 775.95/x
  3. Step 3: Cross multiply
    892.05x = 1,336.90 × 775.95
  4. Step 4: Simplify right side
    892.05x = 1,037,365.62
  5. Step 5: Solve for x
    x = 1,037,365.62/892.05
  6. Step 6: Final answer
    x = 1,162.90

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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.