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Finding the Fourth Proportional to 1,176.38, 1,764.86 and 628.41

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Solution

The fourth proportional to 1,176.38, 1,764.86 and 628.41 is: 942.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,176.38 : 1,764.86 = 628.41 : x
  2. Step 2: Convert to fraction form
    1,176.38/1,764.86 = 628.41/x
  3. Step 3: Cross multiply
    1,176.38x = 1,764.86 × 628.41
  4. Step 4: Simplify right side
    1,176.38x = 1,109,052.53
  5. Step 5: Solve for x
    x = 1,109,052.53/1,176.38
  6. Step 6: Final answer
    x = 942.77

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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.