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Finding the Fourth Proportional to 275.15, 412.81 and 92.67

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Solution

The fourth proportional to 275.15, 412.81 and 92.67 is: 139.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.15 : 412.81 = 92.67 : x
  2. Step 2: Convert to fraction form
    275.15/412.81 = 92.67/x
  3. Step 3: Cross multiply
    275.15x = 412.81 × 92.67
  4. Step 4: Simplify right side
    275.15x = 38,254.87
  5. Step 5: Solve for x
    x = 38,254.87/275.15
  6. Step 6: Final answer
    x = 139.03

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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.