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Finding the Fourth Proportional to 930.75, 1,395.95 and 272.48

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Solution

The fourth proportional to 930.75, 1,395.95 and 272.48 is: 408.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    930.75 : 1,395.95 = 272.48 : x
  2. Step 2: Convert to fraction form
    930.75/1,395.95 = 272.48/x
  3. Step 3: Cross multiply
    930.75x = 1,395.95 × 272.48
  4. Step 4: Simplify right side
    930.75x = 380,369.50
  5. Step 5: Solve for x
    x = 380,369.50/930.75
  6. Step 6: Final answer
    x = 408.67

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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.