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Finding the Fourth Proportional to 1,182.20, 1,773.09 and 316.44

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Solution

The fourth proportional to 1,182.20, 1,773.09 and 316.44 is: 474.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,182.20 : 1,773.09 = 316.44 : x
  2. Step 2: Convert to fraction form
    1,182.20/1,773.09 = 316.44/x
  3. Step 3: Cross multiply
    1,182.20x = 1,773.09 × 316.44
  4. Step 4: Simplify right side
    1,182.20x = 561,076.60
  5. Step 5: Solve for x
    x = 561,076.60/1,182.20
  6. Step 6: Final answer
    x = 474.61

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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.