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Finding the Fourth Proportional to 930.67, 1,395.75 and 272.69

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Solution

The fourth proportional to 930.67, 1,395.75 and 272.69 is: 408.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    930.67 : 1,395.75 = 272.69 : x
  2. Step 2: Convert to fraction form
    930.67/1,395.75 = 272.69/x
  3. Step 3: Cross multiply
    930.67x = 1,395.75 × 272.69
  4. Step 4: Simplify right side
    930.67x = 380,609.31
  5. Step 5: Solve for x
    x = 380,609.31/930.67
  6. Step 6: Final answer
    x = 408.96

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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.