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Finding the Fourth Proportional to 767.72, 1,151.58 and 190.60

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Solution

The fourth proportional to 767.72, 1,151.58 and 190.60 is: 285.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    767.72 : 1,151.58 = 190.60 : x
  2. Step 2: Convert to fraction form
    767.72/1,151.58 = 190.60/x
  3. Step 3: Cross multiply
    767.72x = 1,151.58 × 190.60
  4. Step 4: Simplify right side
    767.72x = 219,488.27
  5. Step 5: Solve for x
    x = 219,488.27/767.72
  6. Step 6: Final answer
    x = 285.90

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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.